CVE-2026-74730
Published: August 27, 2026Last modified: August 27, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.8 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Vulnerable (6.1.182-r0) |
| 25 LTS | linux-lts | Vulnerable (6.12.103-r0) | |
| Stream | linux-lts | Fixed (6.18.46-r0) |
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