CVE-2025-38393

Summary

In the Linux kernel, the following vulnerability has been resolved: NFSv4/pNFS: Fix a race to wake on NFS_LAYOUT_DRAIN We found a few different systems hung up in writeback waiting on the same page lock, and one task waiting on the NFS_LAYOUT_DRAIN bit in pnfs_update_layout(), however the pnfs_layout_hdr's plh_outstanding count was zero. It seems most likely that this is another race between the waiter and waker similar to commit ed0172af5d6f ("SUNRPC: Fix a race to wake a sync task"). Fix it up by applying the advised barrier.

Impact & exploitability

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

Affected products we track (2)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/08287df60bac5b008b6bcdb03053988335d3d282 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/08287df60bac5b008b6bcdb03053988335d3d282Patch
• https://git.kernel.org/stable/c/1f4da20080718f258e189a2c5f515385fa393da6Patch
• https://git.kernel.org/stable/c/864a54c1243ed3ca60baa4bc492dede1361f4c83Patch
• https://git.kernel.org/stable/c/8846fd02c98da8b79e6343a20e6071be6f372180Patch
• https://git.kernel.org/stable/c/8ca65fa71024a1767a59ffbc6a6e2278af84735ePatch
• https://git.kernel.org/stable/c/c01776287414ca43412d1319d2877cbad65444acPatch
• https://git.kernel.org/stable/c/e4b13885e7ef1e64e45268feef1e5f0707c47e72Patch
• https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlAdvisory