SB2026082437 - Use-after-free in Linux kernel nfs
Published: August 24, 2026
Security Bulletin ID
SB2026082437
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-74730)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 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]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in the NFS FREE_STATEID handling in fs/nfs/nfs4proc.c when processing a delayed FREE_STATEID operation. A local user can trigger a delayed FREE_STATEID operation to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/80ed3d762628b36c9e4b22fac7c65b72ef3b13dd
- https://git.kernel.org/stable/c/af62f1af182d33a0de38308c012841885d8ab92e
- https://git.kernel.org/stable/c/caee6a68ffaa5016dfc01cd0b3dc1896a32e3abd
- https://git.kernel.org/stable/c/cf616096a0f3a2b60f7d68b6b39674a6867ded9c
- https://git.kernel.org/stable/c/d71dfffa512e71b166a889484e4c3b148a9a3af2
- https://git.kernel.org/stable/c/d858ab09e787106432d4d9830bad9dfedf02f890
- https://git.kernel.org/stable/c/ed1161ab6239761958b38d5667225634fc2be894
- https://git.kernel.org/stable/c/ed2f92ce2fc48463c41e0e540b9a3454889e8af8