Linux Kernel: NFS struct nfs_server Use-After-Free in FREE_STATEID
CVE-2026-74730 Published on August 22, 2026
NFS: Pin the 'struct nfs_server' during a FREE_STATEID call
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.
Products Associated with CVE-2026-74730
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Affected Versions
Linux:- Version 7c1d5fae4a87d3cf3e9ffd68bcdbaf6529013009 and below ed2f92ce2fc48463c41e0e540b9a3454889e8af8 is affected.
- Version 7c1d5fae4a87d3cf3e9ffd68bcdbaf6529013009 and below d858ab09e787106432d4d9830bad9dfedf02f890 is affected.
- Version 7c1d5fae4a87d3cf3e9ffd68bcdbaf6529013009 and below af62f1af182d33a0de38308c012841885d8ab92e is affected.
- Version 7c1d5fae4a87d3cf3e9ffd68bcdbaf6529013009 and below caee6a68ffaa5016dfc01cd0b3dc1896a32e3abd is affected.
- Version 7c1d5fae4a87d3cf3e9ffd68bcdbaf6529013009 and below ed1161ab6239761958b38d5667225634fc2be894 is affected.
- Version 7c1d5fae4a87d3cf3e9ffd68bcdbaf6529013009 and below d71dfffa512e71b166a889484e4c3b148a9a3af2 is affected.
- Version 7c1d5fae4a87d3cf3e9ffd68bcdbaf6529013009 and below 80ed3d762628b36c9e4b22fac7c65b72ef3b13dd is affected.
- Version 7c1d5fae4a87d3cf3e9ffd68bcdbaf6529013009 and below cf616096a0f3a2b60f7d68b6b39674a6867ded9c is affected.
- Version 3.10 is affected.
- Before 3.10 is unaffected.
- Version 5.10.265, <= 5.10.* is unaffected.
- Version 5.15.216, <= 5.15.* is unaffected.
- Version 6.1.183, <= 6.1.* is unaffected.
- Version 6.6.152, <= 6.6.* is unaffected.
- Version 6.12.104, <= 6.12.* is unaffected.
- Version 6.18.45, <= 6.18.* is unaffected.
- Version 7.1.9, <= 7.1.* is unaffected.
- Version 7.2, <= * is unaffected.