Use-after-free in Linux kernel - CVE-2026-74730
Published: August 24, 2026
Vulnerability identifier: #VU144598
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-2026-74730
CWE-ID: CWE-416
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 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.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-74730
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.105-1
linux (Debian package) - update to 6.12.105-1
External 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