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Description

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.

PUBLISHED Reserved 2025-04-16 | Published 2025-07-25 | Updated 2026-05-23 | Assigner Linux

Product status

Default status
unaffected

8acc3e228e1c90bd410f73597a4549e0409f22d6 (git) before 08287df60bac5b008b6bcdb03053988335d3d282
affected

ec23a86e060cbe30b62eb2955adc97c92d80cc4c (git) before 8846fd02c98da8b79e6343a20e6071be6f372180
affected

880265c77ac415090090d1fe72a188fee71cb458 (git) before e4b13885e7ef1e64e45268feef1e5f0707c47e72
affected

880265c77ac415090090d1fe72a188fee71cb458 (git) before 8ca65fa71024a1767a59ffbc6a6e2278af84735e
affected

880265c77ac415090090d1fe72a188fee71cb458 (git) before 864a54c1243ed3ca60baa4bc492dede1361f4c83
affected

880265c77ac415090090d1fe72a188fee71cb458 (git) before 1f4da20080718f258e189a2c5f515385fa393da6
affected

880265c77ac415090090d1fe72a188fee71cb458 (git) before c01776287414ca43412d1319d2877cbad65444ac
affected

f133819e24e78f3aaaa00e9fa2b816d5f73fd172 (git)
affected

5.10.124 (semver) before 5.10.240
affected

5.15.49 (semver) before 5.15.187
affected

5.18.6 (semver) before 5.19
affected

Default status
affected

5.19
affected

Any version before 5.19
unaffected

5.10.240 (semver)
unaffected

5.15.187 (semver)
unaffected

6.1.144 (semver)
unaffected

6.6.97 (semver)
unaffected

6.12.37 (semver)
unaffected

6.15.6 (semver)
unaffected

6.16 (original_commit_for_fix)
unaffected

References

lists.debian.org/debian-lts-announce/2025/10/msg00008.html

lists.debian.org/debian-lts-announce/2025/10/msg00007.html

cert-portal.siemens.com/productcert/html/ssa-082556.html

git.kernel.org/...c/08287df60bac5b008b6bcdb03053988335d3d282

git.kernel.org/...c/8846fd02c98da8b79e6343a20e6071be6f372180

git.kernel.org/...c/e4b13885e7ef1e64e45268feef1e5f0707c47e72

git.kernel.org/...c/8ca65fa71024a1767a59ffbc6a6e2278af84735e

git.kernel.org/...c/864a54c1243ed3ca60baa4bc492dede1361f4c83

git.kernel.org/...c/1f4da20080718f258e189a2c5f515385fa393da6

git.kernel.org/...c/c01776287414ca43412d1319d2877cbad65444ac

cve.org (CVE-2025-38393)

nvd.nist.gov (CVE-2025-38393)

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