CVE-2026-42748 - WordPress WPify Woo Czech plugin <= 5.4.1 - Arbitrary File Upload vulnerability
CVE ID :CVE-2026-42748
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Unrestricted Upload of File with Dangerous Type vulnerability in WPify WPify Woo Czech wpify-woo allows Upload a Web Shell to a Web Server.This issue affects WPify Woo Czech: from n/a through <= 5.4.1.
Severity: 9.9 | CRITICAL
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CVE ID :CVE-2026-42748
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Unrestricted Upload of File with Dangerous Type vulnerability in WPify WPify Woo Czech wpify-woo allows Upload a Web Shell to a Web Server.This issue affects WPify Woo Czech: from n/a through <= 5.4.1.
Severity: 9.9 | CRITICAL
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CVE-2026-42749 - WordPress Disable Comments for Any Post Types (Remove comments) plugin <= 1.3.0 - Broken Authentication vulnerability
CVE ID :CVE-2026-42749
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Authentication Bypass Using an Alternate Path or Channel vulnerability in Themeisle Disable Comments for Any Post Types (Remove comments) comments-plus allows Password Recovery Exploitation.This issue affects Disable Comments for Any Post Types (Remove comments): from n/a through <= 1.3.0.
Severity: 7.1 | HIGH
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CVE ID :CVE-2026-42749
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Authentication Bypass Using an Alternate Path or Channel vulnerability in Themeisle Disable Comments for Any Post Types (Remove comments) comments-plus allows Password Recovery Exploitation.This issue affects Disable Comments for Any Post Types (Remove comments): from n/a through <= 1.3.0.
Severity: 7.1 | HIGH
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CVE-2026-42750 - WordPress WPComplete plugin <= 2.9.5.4 - Cross Site Scripting (XSS) vulnerability
CVE ID :CVE-2026-42750
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Nexcess WPComplete wpcomplete allows Stored XSS.This issue affects WPComplete: from n/a through <= 2.9.5.4.
Severity: 6.5 | MEDIUM
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CVE ID :CVE-2026-42750
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Nexcess WPComplete wpcomplete allows Stored XSS.This issue affects WPComplete: from n/a through <= 2.9.5.4.
Severity: 6.5 | MEDIUM
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CVE-2026-42751 - WordPress Booking Manager plugin <= 2.1.18 - Cross Site Scripting (XSS) vulnerability
CVE ID :CVE-2026-42751
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in wpdevelop Booking Manager booking-manager allows Stored XSS.This issue affects Booking Manager: from n/a through <= 2.1.18.
Severity: 6.5 | MEDIUM
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CVE ID :CVE-2026-42751
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in wpdevelop Booking Manager booking-manager allows Stored XSS.This issue affects Booking Manager: from n/a through <= 2.1.18.
Severity: 6.5 | MEDIUM
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CVE-2026-42753 - WordPress WCFM Membership plugin <= 2.11.10 - Broken Access Control vulnerability
CVE ID :CVE-2026-42753
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Missing Authorization vulnerability in WC Lovers WCFM Membership wc-multivendor-membership allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WCFM Membership: from n/a through <= 2.11.10.
Severity: 7.3 | HIGH
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CVE ID :CVE-2026-42753
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Missing Authorization vulnerability in WC Lovers WCFM Membership wc-multivendor-membership allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WCFM Membership: from n/a through <= 2.11.10.
Severity: 7.3 | HIGH
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CVE-2026-42754 - WordPress Favicon plugin <= 1.3.46 - Cross Site Scripting (XSS) vulnerability
CVE ID :CVE-2026-42754
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in phbernard Favicon favicon-by-realfavicongenerator allows Reflected XSS.This issue affects Favicon: from n/a through <= 1.3.46.
Severity: 7.1 | HIGH
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CVE ID :CVE-2026-42754
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in phbernard Favicon favicon-by-realfavicongenerator allows Reflected XSS.This issue affects Favicon: from n/a through <= 1.3.46.
Severity: 7.1 | HIGH
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CVE-2026-42755 - WordPress TableOn plugin <= 1.0.5.1 - SQL Injection vulnerability
CVE ID :CVE-2026-42755
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in RealMag777 TableOn posts-table-filterable allows Blind SQL Injection.This issue affects TableOn: from n/a through <= 1.0.5.1.
Severity: 9.3 | CRITICAL
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CVE ID :CVE-2026-42755
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in RealMag777 TableOn posts-table-filterable allows Blind SQL Injection.This issue affects TableOn: from n/a through <= 1.0.5.1.
Severity: 9.3 | CRITICAL
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CVE-2026-42756 - WordPress QuickWebP – Compress / Optimize Images & Convert WebP | SEO Friendly plugin <= 3.2.7 - Arbitrary File Deletion vulnerability
CVE ID :CVE-2026-42756
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Ludwig You QuickWebP – Compress / Optimize Images & Convert WebP | SEO Friendly quickwebp allows Path Traversal.This issue affects QuickWebP – Compress / Optimize Images & Convert WebP | SEO Friendly: from n/a through <= 3.2.7.
Severity: 9.9 | CRITICAL
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CVE ID :CVE-2026-42756
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Ludwig You QuickWebP – Compress / Optimize Images & Convert WebP | SEO Friendly quickwebp allows Path Traversal.This issue affects QuickWebP – Compress / Optimize Images & Convert WebP | SEO Friendly: from n/a through <= 3.2.7.
Severity: 9.9 | CRITICAL
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CVE-2026-42757 - WordPress WebinarIgnition plugin < 4.08.253 - Arbitrary File Deletion vulnerability
CVE ID :CVE-2026-42757
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Saleswonder Team: Tobias WebinarIgnition webinar-ignition allows Path Traversal.This issue affects WebinarIgnition: from n/a through < 4.08.253.
Severity: 9.9 | CRITICAL
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CVE ID :CVE-2026-42757
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Saleswonder Team: Tobias WebinarIgnition webinar-ignition allows Path Traversal.This issue affects WebinarIgnition: from n/a through < 4.08.253.
Severity: 9.9 | CRITICAL
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CVE-2026-42758 - WordPress WebinarIgnition plugin < 4.08.253 - Privilege Escalation vulnerability
CVE ID :CVE-2026-42758
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Incorrect Privilege Assignment vulnerability in Saleswonder Team: Tobias WebinarIgnition webinar-ignition allows Privilege Escalation.This issue affects WebinarIgnition: from n/a through < 4.08.253.
Severity: 9.8 | CRITICAL
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CVE ID :CVE-2026-42758
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Incorrect Privilege Assignment vulnerability in Saleswonder Team: Tobias WebinarIgnition webinar-ignition allows Privilege Escalation.This issue affects WebinarIgnition: from n/a through < 4.08.253.
Severity: 9.8 | CRITICAL
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CVE-2026-42759 - WordPress Affiliate Super Assistent plugin <= 1.10.1 - Cross Site Scripting (XSS) vulnerability
CVE ID :CVE-2026-42759
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Timo Affiliate Super Assistent amazonsimpleadmin allows Stored XSS.This issue affects Affiliate Super Assistent: from n/a through <= 1.10.1.
Severity: 7.1 | HIGH
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CVE ID :CVE-2026-42759
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Timo Affiliate Super Assistent amazonsimpleadmin allows Stored XSS.This issue affects Affiliate Super Assistent: from n/a through <= 1.10.1.
Severity: 7.1 | HIGH
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CVE-2026-42760 - WordPress Backup and Staging by WP Time Capsule plugin <= 1.22.25 - Broken Authentication vulnerability
CVE ID :CVE-2026-42760
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Authentication Bypass Using an Alternate Path or Channel vulnerability in revmakx Backup and Staging by WP Time Capsule wp-time-capsule allows Password Recovery Exploitation.This issue affects Backup and Staging by WP Time Capsule: from n/a through <= 1.22.25.
Severity: 7.5 | HIGH
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CVE ID :CVE-2026-42760
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Authentication Bypass Using an Alternate Path or Channel vulnerability in revmakx Backup and Staging by WP Time Capsule wp-time-capsule allows Password Recovery Exploitation.This issue affects Backup and Staging by WP Time Capsule: from n/a through <= 1.22.25.
Severity: 7.5 | HIGH
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CVE-2026-42761 - WordPress Active Products Tables for WooCommerce plugin <= 1.0.9 - SQL Injection vulnerability
CVE ID :CVE-2026-42761
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in RealMag777 Active Products Tables for WooCommerce profit-products-tables-for-woocommerce allows Blind SQL Injection.This issue affects Active Products Tables for WooCommerce: from n/a through <= 1.0.9.
Severity: 9.3 | CRITICAL
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CVE ID :CVE-2026-42761
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in RealMag777 Active Products Tables for WooCommerce profit-products-tables-for-woocommerce allows Blind SQL Injection.This issue affects Active Products Tables for WooCommerce: from n/a through <= 1.0.9.
Severity: 9.3 | CRITICAL
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CVE-2026-42762 - WordPress VikBooking Hotel Booking Engine & PMS plugin <= 1.8.9 - Cross Site Scripting (XSS) vulnerability
CVE ID :CVE-2026-42762
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in e4jvikwp VikBooking Hotel Booking Engine & PMS vikbooking allows DOM-Based XSS.This issue affects VikBooking Hotel Booking Engine & PMS: from n/a through <= 1.8.9.
Severity: 7.1 | HIGH
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CVE ID :CVE-2026-42762
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in e4jvikwp VikBooking Hotel Booking Engine & PMS vikbooking allows DOM-Based XSS.This issue affects VikBooking Hotel Booking Engine & PMS: from n/a through <= 1.8.9.
Severity: 7.1 | HIGH
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CVE-2026-45837 - bpf: Fix use-after-free in arena_vm_close on fork
CVE ID :CVE-2026-45837
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: bpf: Fix use-after-free in arena_vm_close on fork arena_vm_open() only bumps vml->mmap_count but never registers the child VMA in arena->vma_list. The vml->vma always points at the parent VMA, so after parent munmap the pointer dangles. If the child then calls bpf_arena_free_pages(), zap_pages() reads the stale vml->vma triggering use-after-free. Fix this by preventing the arena VMA from being inherited across fork with VM_DONTCOPY, and preventing VMA splits via the may_split callback. Also reject mremap with a .mremap callback returning -EINVAL. A same-size mremap(MREMAP_FIXED) on the full arena VMA reaches copy_vma() through the following path: check_prep_vma() - returns 0 early: new_len == old_len skips VM_DONTEXPAND check prep_move_vma() - vm_start == old_addr and vm_end == old_addr + old_len so may_split is never called move_vma() copy_vma_and_data() copy_vma() vm_area_dup() - copies vm_private_data (vml pointer) vm_ops->open() - bumps vml->mmap_count vm_ops->mremap() - returns -EINVAL, rollback unmaps new VMA The refcount ensures the rollback's arena_vm_close does not free the vml shared with the original VMA.
Severity: 0.0 | NA
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CVE ID :CVE-2026-45837
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: bpf: Fix use-after-free in arena_vm_close on fork arena_vm_open() only bumps vml->mmap_count but never registers the child VMA in arena->vma_list. The vml->vma always points at the parent VMA, so after parent munmap the pointer dangles. If the child then calls bpf_arena_free_pages(), zap_pages() reads the stale vml->vma triggering use-after-free. Fix this by preventing the arena VMA from being inherited across fork with VM_DONTCOPY, and preventing VMA splits via the may_split callback. Also reject mremap with a .mremap callback returning -EINVAL. A same-size mremap(MREMAP_FIXED) on the full arena VMA reaches copy_vma() through the following path: check_prep_vma() - returns 0 early: new_len == old_len skips VM_DONTEXPAND check prep_move_vma() - vm_start == old_addr and vm_end == old_addr + old_len so may_split is never called move_vma() copy_vma_and_data() copy_vma() vm_area_dup() - copies vm_private_data (vml pointer) vm_ops->open() - bumps vml->mmap_count vm_ops->mremap() - returns -EINVAL, rollback unmaps new VMA The refcount ensures the rollback's arena_vm_close does not free the vml shared with the original VMA.
Severity: 0.0 | NA
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CVE-2026-45838 - bpf: fix end-of-list detection in cgroup_storage_get_next_key()
CVE ID :CVE-2026-45838
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: bpf: fix end-of-list detection in cgroup_storage_get_next_key() list_next_entry() never returns NULL -- when the current element is the last entry it wraps to the list head via container_of(). The subsequent NULL check is therefore dead code and get_next_key() never returns -ENOENT for the last element, instead reading storage->key from a bogus pointer that aliases internal map fields and copying the result to userspace. Replace it with list_entry_is_head() so the function correctly returns -ENOENT when there are no more entries.
Severity: 0.0 | NA
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CVE ID :CVE-2026-45838
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: bpf: fix end-of-list detection in cgroup_storage_get_next_key() list_next_entry() never returns NULL -- when the current element is the last entry it wraps to the list head via container_of(). The subsequent NULL check is therefore dead code and get_next_key() never returns -ENOENT for the last element, instead reading storage->key from a bogus pointer that aliases internal map fields and copying the result to userspace. Replace it with list_entry_is_head() so the function correctly returns -ENOENT when there are no more entries.
Severity: 0.0 | NA
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CVE-2026-45839 - bpf: reject negative CO-RE accessor indices in bpf_core_parse_spec()
CVE ID :CVE-2026-45839
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: bpf: reject negative CO-RE accessor indices in bpf_core_parse_spec() CO-RE accessor strings are colon-separated indices that describe a path from a root BTF type to a target field, e.g. "0:1:2" walks through nested struct members. bpf_core_parse_spec() parses each component with sscanf("%d"), so negative values like -1 are silently accepted. The subsequent bounds checks (access_idx >= btf_vlen(t)) only guard the upper bound and always pass for negative values because C integer promotion converts the __u16 btf_vlen result to int, making the comparison (int)(-1) >= (int)(N) false for any positive N. When -1 reaches btf_member_bit_offset() it gets cast to u32 0xffffffff, producing an out-of-bounds read far past the members array. A crafted BPF program with a negative CO-RE accessor on any struct that exists in vmlinux BTF (e.g. task_struct) crashes the kernel deterministically during BPF_PROG_LOAD on any system with CONFIG_DEBUG_INFO_BTF=y (default on major distributions). The bug is reachable with CAP_BPF: BUG: unable to handle page fault for address: ffffed11818b6626 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page Oops: Oops: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 85 Comm: poc Not tainted 7.0.0-rc6 #18 PREEMPT(full) RIP: 0010:bpf_core_parse_spec (tools/lib/bpf/relo_core.c:354) RAX: 00000000ffffffff Call Trace: bpf_core_calc_relo_insn (tools/lib/bpf/relo_core.c:1321) bpf_core_apply (kernel/bpf/btf.c:9507) check_core_relo (kernel/bpf/verifier.c:19475) bpf_check (kernel/bpf/verifier.c:26031) bpf_prog_load (kernel/bpf/syscall.c:3089) __sys_bpf (kernel/bpf/syscall.c:6228) CO-RE accessor indices are inherently non-negative (struct member index, array element index, or enumerator index), so reject them immediately after parsing.
Severity: 0.0 | NA
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CVE ID :CVE-2026-45839
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: bpf: reject negative CO-RE accessor indices in bpf_core_parse_spec() CO-RE accessor strings are colon-separated indices that describe a path from a root BTF type to a target field, e.g. "0:1:2" walks through nested struct members. bpf_core_parse_spec() parses each component with sscanf("%d"), so negative values like -1 are silently accepted. The subsequent bounds checks (access_idx >= btf_vlen(t)) only guard the upper bound and always pass for negative values because C integer promotion converts the __u16 btf_vlen result to int, making the comparison (int)(-1) >= (int)(N) false for any positive N. When -1 reaches btf_member_bit_offset() it gets cast to u32 0xffffffff, producing an out-of-bounds read far past the members array. A crafted BPF program with a negative CO-RE accessor on any struct that exists in vmlinux BTF (e.g. task_struct) crashes the kernel deterministically during BPF_PROG_LOAD on any system with CONFIG_DEBUG_INFO_BTF=y (default on major distributions). The bug is reachable with CAP_BPF: BUG: unable to handle page fault for address: ffffed11818b6626 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page Oops: Oops: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 85 Comm: poc Not tainted 7.0.0-rc6 #18 PREEMPT(full) RIP: 0010:bpf_core_parse_spec (tools/lib/bpf/relo_core.c:354) RAX: 00000000ffffffff Call Trace: bpf_core_calc_relo_insn (tools/lib/bpf/relo_core.c:1321) bpf_core_apply (kernel/bpf/btf.c:9507) check_core_relo (kernel/bpf/verifier.c:19475) bpf_check (kernel/bpf/verifier.c:26031) bpf_prog_load (kernel/bpf/syscall.c:3089) __sys_bpf (kernel/bpf/syscall.c:6228) CO-RE accessor indices are inherently non-negative (struct member index, array element index, or enumerator index), so reject them immediately after parsing.
Severity: 0.0 | NA
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CVE-2026-45840 - openvswitch: cap upcall PID array size and pre-size vport replies
CVE ID :CVE-2026-45840
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: openvswitch: cap upcall PID array size and pre-size vport replies The vport netlink reply helpers allocate a fixed-size skb with nlmsg_new(NLMSG_DEFAULT_SIZE, ...) but serialize the full upcall PID array via ovs_vport_get_upcall_portids(). Since ovs_vport_set_upcall_portids() accepts any non-zero multiple of sizeof(u32) with no upper bound, a CAP_NET_ADMIN user can install a PID array large enough to overflow the reply buffer, causing nla_put() to fail with -EMSGSIZE and hitting BUG_ON(err < 0). On systems with unprivileged user namespaces enabled (e.g., Ubuntu default), this is reachable via unshare -Urn since OVS vport mutation operations use GENL_UNS_ADMIN_PERM. kernel BUG at net/openvswitch/datapath.c:2414! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 65 Comm: poc Not tainted 7.0.0-rc7-00195-geb216e422044 #1 RIP: 0010:ovs_vport_cmd_set+0x34c/0x400 Call Trace: genl_family_rcv_msg_doit (net/netlink/genetlink.c:1116) genl_rcv_msg (net/netlink/genetlink.c:1194) netlink_rcv_skb (net/netlink/af_netlink.c:2550) genl_rcv (net/netlink/genetlink.c:1219) netlink_unicast (net/netlink/af_netlink.c:1344) netlink_sendmsg (net/netlink/af_netlink.c:1894) __sys_sendto (net/socket.c:2206) __x64_sys_sendto (net/socket.c:2209) do_syscall_64 (arch/x86/entry/syscall_64.c:63) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) Kernel panic - not syncing: Fatal exception Reject attempts to set more PIDs than nr_cpu_ids in ovs_vport_set_upcall_portids(), and pre-compute the worst-case reply size in ovs_vport_cmd_msg_size() based on that bound, similar to the existing ovs_dp_cmd_msg_size(). nr_cpu_ids matches the cap already used by the per-CPU dispatch configuration on the datapath side (ovs_dp_cmd_fill_info() serialises at most nr_cpu_ids PIDs), so the two sides stay consistent.
Severity: 0.0 | NA
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CVE ID :CVE-2026-45840
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: openvswitch: cap upcall PID array size and pre-size vport replies The vport netlink reply helpers allocate a fixed-size skb with nlmsg_new(NLMSG_DEFAULT_SIZE, ...) but serialize the full upcall PID array via ovs_vport_get_upcall_portids(). Since ovs_vport_set_upcall_portids() accepts any non-zero multiple of sizeof(u32) with no upper bound, a CAP_NET_ADMIN user can install a PID array large enough to overflow the reply buffer, causing nla_put() to fail with -EMSGSIZE and hitting BUG_ON(err < 0). On systems with unprivileged user namespaces enabled (e.g., Ubuntu default), this is reachable via unshare -Urn since OVS vport mutation operations use GENL_UNS_ADMIN_PERM. kernel BUG at net/openvswitch/datapath.c:2414! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 65 Comm: poc Not tainted 7.0.0-rc7-00195-geb216e422044 #1 RIP: 0010:ovs_vport_cmd_set+0x34c/0x400 Call Trace: genl_family_rcv_msg_doit (net/netlink/genetlink.c:1116) genl_rcv_msg (net/netlink/genetlink.c:1194) netlink_rcv_skb (net/netlink/af_netlink.c:2550) genl_rcv (net/netlink/genetlink.c:1219) netlink_unicast (net/netlink/af_netlink.c:1344) netlink_sendmsg (net/netlink/af_netlink.c:1894) __sys_sendto (net/socket.c:2206) __x64_sys_sendto (net/socket.c:2209) do_syscall_64 (arch/x86/entry/syscall_64.c:63) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) Kernel panic - not syncing: Fatal exception Reject attempts to set more PIDs than nr_cpu_ids in ovs_vport_set_upcall_portids(), and pre-compute the worst-case reply size in ovs_vport_cmd_msg_size() based on that bound, similar to the existing ovs_dp_cmd_msg_size(). nr_cpu_ids matches the cap already used by the per-CPU dispatch configuration on the datapath side (ovs_dp_cmd_fill_info() serialises at most nr_cpu_ids PIDs), so the two sides stay consistent.
Severity: 0.0 | NA
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CVE-2026-45841 - netfilter: nfnetlink_osf: fix divide-by-zero in OSF_WSS_MODULO
CVE ID :CVE-2026-45841
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_osf: fix divide-by-zero in OSF_WSS_MODULO nf_osf_match_one() computes ctx->window % f->wss.val in the OSF_WSS_MODULO branch with no guard for f->wss.val == 0. A CAP_NET_ADMIN user can add such a fingerprint via nfnetlink; a subsequent matching TCP SYN divides by zero and panics the kernel. Reject the bogus fingerprint in nfnl_osf_add_callback() above the per-option for-loop. f->wss is per-fingerprint, not per-option, so the check must run regardless of f->opt_num (including 0). Also reject wss.wc >= OSF_WSS_MAX; nf_osf_match_one() already treats that as "should not happen". Crash: Oops: divide error: 0000 [#1] SMP KASAN NOPTI RIP: 0010:nf_osf_match_one (net/netfilter/nfnetlink_osf.c:98) Call Trace: nf_osf_match (net/netfilter/nfnetlink_osf.c:220) xt_osf_match_packet (net/netfilter/xt_osf.c:32) ipt_do_table (net/ipv4/netfilter/ip_tables.c:348) nf_hook_slow (net/netfilter/core.c:622) ip_local_deliver (net/ipv4/ip_input.c:265) ip_rcv (include/linux/skbuff.h:1162) __netif_receive_skb_one_core (net/core/dev.c:6181) process_backlog (net/core/dev.c:6642) __napi_poll (net/core/dev.c:7710) net_rx_action (net/core/dev.c:7945) handle_softirqs (kernel/softirq.c:622)
Severity: 0.0 | NA
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CVE ID :CVE-2026-45841
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_osf: fix divide-by-zero in OSF_WSS_MODULO nf_osf_match_one() computes ctx->window % f->wss.val in the OSF_WSS_MODULO branch with no guard for f->wss.val == 0. A CAP_NET_ADMIN user can add such a fingerprint via nfnetlink; a subsequent matching TCP SYN divides by zero and panics the kernel. Reject the bogus fingerprint in nfnl_osf_add_callback() above the per-option for-loop. f->wss is per-fingerprint, not per-option, so the check must run regardless of f->opt_num (including 0). Also reject wss.wc >= OSF_WSS_MAX; nf_osf_match_one() already treats that as "should not happen". Crash: Oops: divide error: 0000 [#1] SMP KASAN NOPTI RIP: 0010:nf_osf_match_one (net/netfilter/nfnetlink_osf.c:98) Call Trace: nf_osf_match (net/netfilter/nfnetlink_osf.c:220) xt_osf_match_packet (net/netfilter/xt_osf.c:32) ipt_do_table (net/ipv4/netfilter/ip_tables.c:348) nf_hook_slow (net/netfilter/core.c:622) ip_local_deliver (net/ipv4/ip_input.c:265) ip_rcv (include/linux/skbuff.h:1162) __netif_receive_skb_one_core (net/core/dev.c:6181) process_backlog (net/core/dev.c:6642) __napi_poll (net/core/dev.c:7710) net_rx_action (net/core/dev.c:7945) handle_softirqs (kernel/softirq.c:622)
Severity: 0.0 | NA
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CVE-2026-45842 - slip: reject VJ receive packets on instances with no rstate array
CVE ID :CVE-2026-45842
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: slip: reject VJ receive packets on instances with no rstate array slhc_init() accepts rslots == 0 as a valid configuration, with the documented meaning of 'no receive compression'. In that case the allocation loop in slhc_init() is skipped, so comp->rstate stays NULL and comp->rslot_limit stays 0 (from the kzalloc of struct slcompress). The receive helpers do not defend against that configuration. slhc_uncompress() dereferences comp->rstate[x] when the VJ header carries an explicit connection ID, and slhc_remember() later assigns cs = &comp->rstate[...] after only comparing the packet's slot number to comp->rslot_limit. Because rslot_limit is 0, slot 0 passes the range check, and the code dereferences a NULL rstate. The configuration is reachable in-tree through PPP. PPPIOCSMAXCID stores its argument in a signed int, and (val >> 16) uses arithmetic shift. Passing 0xffff0000 therefore sign-extends to -1, so val2 + 1 is 0 and ppp_generic.c ends up calling slhc_init(0, 1). Because /dev/ppp open is gated by ns_capable(CAP_NET_ADMIN), the whole path is reachable from an unprivileged user namespace. Once the malformed VJ state is installed, any inbound VJ-compressed or VJ-uncompressed frame that selects slot 0 crashes the kernel in softirq context: Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:slhc_uncompress (drivers/net/slip/slhc.c:519) Call Trace: ppp_receive_nonmp_frame (drivers/net/ppp/ppp_generic.c:2466) ppp_input (drivers/net/ppp/ppp_generic.c:2359) ppp_async_process (drivers/net/ppp/ppp_async.c:492) tasklet_action_common (kernel/softirq.c:926) handle_softirqs (kernel/softirq.c:623) run_ksoftirqd (kernel/softirq.c:1055) smpboot_thread_fn (kernel/smpboot.c:160) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:164) Reject the receive side on such instances instead of touching rstate. slhc_uncompress() falls through to its existing 'bad' label, which bumps sls_i_error and enters the toss state. slhc_remember() mirrors that with an explicit sls_i_error increment followed by slhc_toss(); the sls_i_runt counter is not used here because a missing rstate is an internal configuration state, not a runt packet. The transmit path is unaffected: the only in-tree caller that picks rslots from userspace (ppp_generic.c) still supplies tslots >= 1, and slip.c always calls slhc_init(16, 16), so comp->tstate remains valid and slhc_compress() continues to work.
Severity: 0.0 | NA
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CVE ID :CVE-2026-45842
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: slip: reject VJ receive packets on instances with no rstate array slhc_init() accepts rslots == 0 as a valid configuration, with the documented meaning of 'no receive compression'. In that case the allocation loop in slhc_init() is skipped, so comp->rstate stays NULL and comp->rslot_limit stays 0 (from the kzalloc of struct slcompress). The receive helpers do not defend against that configuration. slhc_uncompress() dereferences comp->rstate[x] when the VJ header carries an explicit connection ID, and slhc_remember() later assigns cs = &comp->rstate[...] after only comparing the packet's slot number to comp->rslot_limit. Because rslot_limit is 0, slot 0 passes the range check, and the code dereferences a NULL rstate. The configuration is reachable in-tree through PPP. PPPIOCSMAXCID stores its argument in a signed int, and (val >> 16) uses arithmetic shift. Passing 0xffff0000 therefore sign-extends to -1, so val2 + 1 is 0 and ppp_generic.c ends up calling slhc_init(0, 1). Because /dev/ppp open is gated by ns_capable(CAP_NET_ADMIN), the whole path is reachable from an unprivileged user namespace. Once the malformed VJ state is installed, any inbound VJ-compressed or VJ-uncompressed frame that selects slot 0 crashes the kernel in softirq context: Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:slhc_uncompress (drivers/net/slip/slhc.c:519) Call Trace: ppp_receive_nonmp_frame (drivers/net/ppp/ppp_generic.c:2466) ppp_input (drivers/net/ppp/ppp_generic.c:2359) ppp_async_process (drivers/net/ppp/ppp_async.c:492) tasklet_action_common (kernel/softirq.c:926) handle_softirqs (kernel/softirq.c:623) run_ksoftirqd (kernel/softirq.c:1055) smpboot_thread_fn (kernel/smpboot.c:160) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:164) Reject the receive side on such instances instead of touching rstate. slhc_uncompress() falls through to its existing 'bad' label, which bumps sls_i_error and enters the toss state. slhc_remember() mirrors that with an explicit sls_i_error increment followed by slhc_toss(); the sls_i_runt counter is not used here because a missing rstate is an internal configuration state, not a runt packet. The transmit path is unaffected: the only in-tree caller that picks rslots from userspace (ppp_generic.c) still supplies tslots >= 1, and slip.c always calls slhc_init(16, 16), so comp->tstate remains valid and slhc_compress() continues to work.
Severity: 0.0 | NA
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CVE-2026-45843 - slip: bound decode() reads against the compressed packet length
CVE ID :CVE-2026-45843
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: slip: bound decode() reads against the compressed packet length slhc_uncompress() parses a VJ-compressed TCP header by advancing a pointer through the packet via decode() and pull16(). Neither helper bounds-checks against isize, and decode() masks its return with & 0xffff so it can never return the -1 that callers test for -- those error paths are dead code. A short compressed frame whose change byte requests optional fields lets decode() read past the end of the packet. The over-read bytes are folded into the cached cstate and reflected into subsequent reconstructed packets. Make decode() and pull16() take the packet end pointer and return -1 when exhausted. Add a bounds check before the TCP-checksum read. The existing == -1 tests now do what they were always meant to.
Severity: 0.0 | NA
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CVE ID :CVE-2026-45843
Published : May 27, 2026, 11:16 a.m. | 58 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: slip: bound decode() reads against the compressed packet length slhc_uncompress() parses a VJ-compressed TCP header by advancing a pointer through the packet via decode() and pull16(). Neither helper bounds-checks against isize, and decode() masks its return with & 0xffff so it can never return the -1 that callers test for -- those error paths are dead code. A short compressed frame whose change byte requests optional fields lets decode() read past the end of the packet. The over-read bytes are folded into the cached cstate and reflected into subsequent reconstructed packets. Make decode() and pull16() take the packet end pointer and return -1 when exhausted. Add a bounds check before the TCP-checksum read. The existing == -1 tests now do what they were always meant to.
Severity: 0.0 | NA
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