PT-2026-27676 · Linux · Linux Kernel

Published 2026-01-01 · Updated 2026-05-26 · CVE-2026-23311

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.15.0-next-20250530-next-20250530 #1

Description The Linux kernel contains a flaw in the event scheduling within the perf/core component, specifically in the ctx sched in() function. Lockdep detected a bug where an invalid wait context occurs when a pinned event fails and attempts to wake up threads in the ring buffer. This issue arises from attempting to acquire a wait-queue lock while holding a perf-context lock, which is incorrect. The fix involves using irq work to address this synchronization problem.

Recommendations Update the Linux kernel to version 6.15.0-next-20250530-next-20250530 #1 or a later version to resolve this issue.

Exploit

Fix

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

CVE-2026-23311

Affected Products

Linux Kernel

References · 16

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23311.json · Exploit
• https://git.kernel.org/stable/c/486ff5ad49bc50315bcaf6d45f04a33ef0a45ced · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-23311 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-23311 · Security Note
• https://ubuntu.com/security/CVE-2026-23311 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23311 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23311 · Vendor Advisory
• https://git.kernel.org/stable/c/c67ab059953e3b66cb17ddd6524c23f9e1f6526d · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-23311 · Security Note
• https://osv.dev/vulnerability/CVE-2026-23311 · Vendor Advisory
• https://git.kernel.org/stable/c/825f218ca70ef394c2b8546b313711d867b24584 · Patch
• https://twitter.com/CVEarity/status/2037928774747222469 · Twitter Post
• https://git.kernel.org/linus/486ff5ad49bc50315bcaf6d45f04a33ef0a45ced · Note
• https://t.me/cveNotify/164706 · Telegram Post
• https://twitter.com/CVEnew/status/2036763539449209282 · Twitter Post