md/raid1: fix writes_pending and barrier reference leaks on write failures

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72440
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:17 UTC
Updated2026-10-21 13:19:38 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: md/raid1: fix writes_pending and barrier reference leaks on write failures raid1_make_request() acquires a writes_pending reference with md_write_start() before calling raid1_write_request(). Several failure paths in raid1_write_request() complete the bio and return without reaching the normal write completion path, causing the corresponding md_write_end() to be skipped. Make raid1_write_request() return a status indicating whether the write request was successfully queued. This allows raid1_make_request() to call md_write_end() when raid1_write_request() fails. Additionally, if wait_blocked_rdev() fails after wait_barrier() succeeds, the associated barrier reference is not released. Call allow_barrier() before returning from that path to keep the barrier accounting balanced.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.004710000 probability, percentile 0.393510000 (date 2026-10-16)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 5aa705039c4fca84575539bfa2b8a28454a3d2ca 921e2baa626d1504bf30295816aaeb90ac8c82f4 git Not specified
CNA Linux Linux affected 5aa705039c4fca84575539bfa2b8a28454a3d2ca a846affa813013204d0cce0cfdaeb99e8fcce188 git Not specified
CNA Linux Linux affected 5aa705039c4fca84575539bfa2b8a28454a3d2ca 7a450460687919e79b5f8503bdeb13ecf4cca311 git Not specified
CNA Linux Linux affected 5aa705039c4fca84575539bfa2b8a28454a3d2ca bffbbfcbd9393e315a7a4286dcd70e875265db9a git Not specified
CNA Linux Linux affected 5aa705039c4fca84575539bfa2b8a28454a3d2ca 8e065a1602511282fc0da2dc89445e0eb71a681c git Not specified
CNA Linux Linux affected 5.17 Not specified
CNA Linux Linux unaffected 5.17 semver Not specified
CNA Linux Linux unaffected 6.6.160 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.114 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.57 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/921e2baa626d1504bf30295816aaeb90ac8c82f4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bffbbfcbd9393e315a7a4286dcd70e875265db9a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a846affa813013204d0cce0cfdaeb99e8fcce188 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8e065a1602511282fc0da2dc89445e0eb71a681c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7a450460687919e79b5f8503bdeb13ecf4cca311 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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