Memory leak in Linux kernel - CVE-2026-89714
Published: September 12, 2026
Vulnerability identifier: #VU149097
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89714
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to failure to release memory in nfs4_server_common_setup() when handling failed NFSv4 mount attempts. A local user can repeatedly attempt to mount an unavailable or incompatible NFSv4 export to cause a denial of service.
Each failed mount attempt leaks a 4 KiB delegation hash table allocation.
Affected software
Linux kernel
How to mitigate CVE-2026-89714
Install security update from vendor's repository.