Description
In the Linux kernel, the following vulnerability has been resolved: NFS: Pin the 'struct nfs_server' during a FREE_STATEID call Dan Aloni reports that he was able to hit a use-after-free bug if a FREE_STATEID operation gets delayed for whatever reason. Fix this by bumping the refcount of the 'struct nfs_server' object for the duration of the FREE_STATEID so it doesn't get cleaned up from underneath us while operations are still in flight.
References8
- git.kernel.org/stable/c/80ed3d762628b36c9e4b22fac7c65b72ef3b13dd
- git.kernel.org/stable/c/af62f1af182d33a0de38308c012841885d8ab92e
- git.kernel.org/stable/c/caee6a68ffaa5016dfc01cd0b3dc1896a32e3abd
- git.kernel.org/stable/c/cf616096a0f3a2b60f7d68b6b39674a6867ded9c
- git.kernel.org/stable/c/d71dfffa512e71b166a889484e4c3b148a9a3af2
- git.kernel.org/stable/c/d858ab09e787106432d4d9830bad9dfedf02f890
- git.kernel.org/stable/c/ed1161ab6239761958b38d5667225634fc2be894
- git.kernel.org/stable/c/ed2f92ce2fc48463c41e0e540b9a3454889e8af8
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 44 · as of 9 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.