SB20260928323 - Race condition in Linux kernel trace

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-97617)

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 cause an out-of-bounds memory mapping.

The vulnerability exists due to a race condition in ring_buffer_subbuf_order_set() when an mmap operation races a failing sub-buffer order change. A local user can race an mmap of an already mapped CPU with a sub-buffer order change to cause an out-of-bounds memory mapping.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/32bf47db9237c5b8b6f6aaa5356bb4c79d241f76
• https://git.kernel.org/stable/c/9fd4ea952e6ac12a63c3fe89f08ad02771aa2c06
• https://git.kernel.org/stable/c/d860c67c051685abb0460b593b193f0f45f4fa92
• https://git.kernel.org/stable/c/f2099644e1b2a2c0805c5240d63ab0522d9d0174