Improper resource shutdown or release in Linux kernel - CVE-2026-93111
Published: September 18, 2026
Vulnerability identifier: #VU150900
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93111
CWE-ID: CWE-404
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to prevent the release of a tracing_multi link.
The vulnerability exists due to improper resource release in register_fentry_multi() BPF trampoline registration when attaching a tracing_multi link followed by an fentry link. A local user can attach a tracing_multi link and then an fentry link to prevent the release of the tracing_multi link.
The condition triggers a kernel warning during tracing_multi link release.
Affected software
Linux kernel
How to mitigate CVE-2026-93111
Install security update from vendor's repository.