SB20260828102 - Improper Check or Handling of Exceptional Conditions in Linux kernel perf

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-80671)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper exceptional condition handling in register_pid() in tools/perf/builtin-sched.c when processing untrusted perf.data that triggers allocation failure. A local user can supply crafted input that causes an allocation failure to cause a denial of service.

The issue is triggered because allocation failures are handled with a BUG_ON condition that terminates the process.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/5949d339f5ec98752d56dcd4e36f619a59d513a5
• https://git.kernel.org/stable/c/5ea1dcc9418c4e06ce29ed5170596f497ba86872
• https://git.kernel.org/stable/c/652cea73b7b7b7c622a2be670e44e3c499c6d49f