Description
In the Linux kernel, the following vulnerability has been resolved: NFS: Fix a race when updating an existing write After nfs_lock_and_join_requests() tests for whether the request is still attached to the mapping, nothing prevents a call to nfs_inode_remove_request() from succeeding until we actually lock the page group. The reason is that whoever called nfs_inode_remove_request() doesn't necessarily have a lock on the page group head. So in order to avoid races, let's take the page group lock earlier in nfs_lock_and_join_requests(), and hold it across the removal of the request in nfs_inode_remove_request().
Affected products
linux: linux kernel; debian: debian linux
References10
- git.kernel.org/stable/c/0ff42a32784e0f2cb46a46da8e9f473538c13e1b Patch
- git.kernel.org/stable/c/181feb41f0b268e6288bf9a7b984624d7fe2031d Patch
- git.kernel.org/stable/c/202a3432d21ac060629a760fff3b0a39859da3ea Patch
- git.kernel.org/stable/c/76d2e3890fb169168c73f2e4f8375c7cc24a765e Patch
- git.kernel.org/stable/c/92278ae36935a54e65fef9f8ea8efe7e80481ace Patch
- git.kernel.org/stable/c/c32e3c71aaa1c1ba05da88605e2ddd493c58794f Patch
- git.kernel.org/stable/c/f230d40147cc37eb3aef4d50e2e2c06ea73d9a77 Patch
- lists.debian.org/debian-lts-announce/2025/10/msg00007.html Mailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html Mailing ListThird Party Advisory
- cert-portal.siemens.com/productcert/html/ssa-032379.html
Metrics
- CVSS 3.1
-
4.7
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 5 · as of 8 November 2026
- CWE
- CWE-362
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