Improper resource shutdown or release in Linux kernel - CVE-2026-89668
Published: September 12, 2026
Vulnerability identifier: #VU149134
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89668
CWE-ID: CWE-404
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to leave orphan debugfs files with stale file-operation pointers into freed module text.
The vulnerability exists due to improper cleanup in the nfsd initialization routine when nfsd4_init_slabs() fails after debugfs initialization. A local privileged user can trigger the affected initialization failure to leave orphan debugfs files with stale file-operation pointers into freed module text.
Affected software
Linux kernel
How to mitigate CVE-2026-89668
Install security update from vendor's repository.