SB2026092502 - Improper Check for Unusual or Exceptional Conditions in Linux kernel trace

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2026-97443)

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

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 kernel warning.

The vulnerability exists due to improper state validation in perf_ftrace_function_unregister() when cleaning up a perf event whose ftrace operations registration failed or was already torn down. A local user can cause perf event cleanup to invoke unregister_ftrace_function() for ftrace operations that are not enabled to trigger a kernel warning.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/7f845820afaad339341c2ae42bc7fdec175df9ea
• https://git.kernel.org/stable/c/9581123304b23049437324038698af9fb56ee663
• https://git.kernel.org/stable/c/df097713b56ffac5eed32a9be2e7d27ac48d9087