CVE-2025-39697

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().

CVSS 3.1

4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 4% of CVEs (scores of 2026-10-25)

CWE

CWE-362

Published

2025-09-05

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

Affected

• debian:debian_linux
• linux:linux_kernel

References

• https://git.kernel.org/stable/c/0ff42a32784e0f2cb46a46da8e9f473538c13e1b
• https://git.kernel.org/stable/c/181feb41f0b268e6288bf9a7b984624d7fe2031d
• https://git.kernel.org/stable/c/202a3432d21ac060629a760fff3b0a39859da3ea
• https://git.kernel.org/stable/c/76d2e3890fb169168c73f2e4f8375c7cc24a765e
• https://git.kernel.org/stable/c/92278ae36935a54e65fef9f8ea8efe7e80481ace

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