SB2026091208 - Race condition in Linux kernel trace

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-89771)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to trigger a race condition during ring buffer reads.

The vulnerability exists due to a race condition in Linux kernel ring buffer reader operations when concurrently resizing ring buffer subbuffers and reading ring buffer pages. A local user can invoke concurrent subbuffer resizing and ring buffer read operations to trigger a race condition during ring buffer reads.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0c7c517827a453128a8f58bfd849546a29813b27
• https://git.kernel.org/stable/c/50f4a793c4ff24826efb0ac700989a5063cc53df
• https://git.kernel.org/stable/c/6d666f0b8b36c0765cf19fbe6de5a7ba5a73aad9
• https://git.kernel.org/stable/c/8a5f63637890f03177146efddaba5ec7a1b4d61f