CVE-2026-74730 NFS: Pin the 'struct nfs_server' during a FREE_STATEID call
A use-after-free vulnerability in the Linux kernel's NFS implementation allows attackers to potentially execute code or escalate privileges via delayed FREE_STATEID operations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-74730?
CVE-2026-74730 is a critical use after free vulnerability in Linux, published on 22 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-74730?
How do I fix CVE-2026-74730?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-74730 being exploited?
There is no known exploitation of CVE-2026-74730 in the wild and no public exploit code.
Sources
Also known as AZL-97275, BELL-CVE-2026-74730, DEBIAN-CVE-2026-74730, GHSA-rmc7-77jw-fvm4, UBUNTU-CVE-2026-74730.