Linux Kernel Security
4.72K subscribers
122 photos
355 links
Links related to Linux kernel security and exploitation | Chat @linkersec_chat | @xairy @a13xp0p0v | Mirrors on https://xairy.io/linkersec
Download Telegram
Unprivileged root via a use-after-free in DRM GEM change_handle (CVE-2026-46215)

Stan Shaw published an article about exploiting UAF in a DRM GEM ioctl. The researcher reallocated freed memory as a pipe_buffer array to set PIPE_BUF_FLAG_CAN_MERGE and perform the Dirty Pipe attack.
🔥10👍1
Bad Epoll: The bug missed by Mythos

Article by Jaeyoung Chung about exploiting CVE-2026-46242 — a race condition bug in the eventpoll subsystem. Jaeyoung exploited this bug to claim a kernelCTF entry, but the vulnerability also affects Android kernels.
🔥26
ITScape: Guest-to-Host Escape in KVM/arm64

Article by Hyunwoo Kim about exploiting a race condition bug in the KVM driver on the arm64 architecture to escape the guest VM.
🔥18🤔2
Januscape: Guest-to-Host Escape in KVM/x86

Hyunwoo Kim published an article about a use-after-free vulnerability in the shadow MMU emulation of KVM/x86 (CVE-2026-53359). Both Intel (VMX) and AMD (SVM) code is affected.

The article only covers achieving a kernel crash via this bug, but the vulnerability can also be exploited to escape the guest VM. The author used this bug to pwn a kvmCTF instance.
🔥14👍6
Unprivileged root via an out-of-bounds write in the FUSE readdir cache (CVE-2026-31694)

Article by Stan Shaw about exploiting a page OOB write bug in the FUSE subsystem by overwriting /etc/passwd in the page cache.
🔥6🤔3👍1
IonStack part II: GhostLock, a stack-UAF that has existed in ALL Linux distributions for 15 years

Article about exploiting a racy stack use-after-free in the futex implementation. The bug was used to pwn a kernelCTF instance.
🔥17👍2
I handed the epoll UAF to an agent

Article by Guy Beck about using Claude for porting an exploit for an eventpoll vulnerability to Android.
🔥9👍4🤔1
IonStack part III: Rooting Android 17 with GhostLock

Article about adapting the exploit of CVE-2026-43499 (racy stack use-after-free in the futex implementation) to Android.

The researchers used KernelSnitch, ashmem fops overwriting, pipe_buffer corruption, and other tricks to perform LPE.
🔥17
Gone in 60 Frames – USB Video Exploitation

Article (and slides) by Alex Plaskett and Robert Herrera about fuzzing USB drivers with syzkaller and writing an exploit that gains code execution over USB on Ubuntu.
🔥15👍2
SCTPhantom: An 18-Year-Old SCTP ASCONF Transport Use-After-Free

Article about exploiting CVE-2026-64564 in the implementation of the Stream Control Transmission Protocol (SCTP). Authors exploited a UAF in the kmalloc-1k cache to gain root and escape a container.
🔥10👏1
Testing race conditions with memory access tracing and stack-based delay injection

Article by Jann Horn about MAccConc — a KCOV-based tool for exploring possible kernel code interleavings of a multi-threaded program.
🔥4👏3👍2
CROSS-X: Generalized and Stable Cross-Cache Attack on the Linux Kernel

Paper by Dong-ok Kim, Juhyun Song, et al. documenting the steps for executing cross-cache attacks for caches with min_partial >= cpu_partial_slabs.

The paper also describes a fuzzing-based approach of finding target slab objects useful for exploitation.
🔥13🤯3👍2