Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-97443
Published: September 25, 2026
Vulnerability identifier: #VU152027
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-97443
CWE-ID: CWE-754
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-97443
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3