md/raid10: fix writes_pending and barrier reference leaks on discard failures

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72438
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:17 UTC
Updated2026-10-21 13:19:37 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: md/raid10: fix writes_pending and barrier reference leaks on discard failures raid10_make_request() acquires a writes_pending reference with md_write_start() before calling raid10_handle_discard(). Several failure paths in raid10_handle_discard() complete the bio and return without releasing the corresponding reference, causing md_write_end() to be skipped. Call md_write_end() before returning from these failure paths to keep writes_pending accounting balanced. Additionally, discard split allocation failures can occur after wait_barrier() succeeds. Those paths return without calling allow_barrier(), leaking the associated barrier reference. Release the barrier before returning from those paths.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.004600000 probability, percentile 0.384590000 (date 2026-10-16)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c9aa889b035fca4598ae985a0f0c76ebbb547ad2 80ac31cce55432034a9eb98262c92ace7866e494 git Not specified
CNA Linux Linux affected c9aa889b035fca4598ae985a0f0c76ebbb547ad2 fea33968592559a55a3f5a96a6386bebcaf988a8 git Not specified
CNA Linux Linux affected c9aa889b035fca4598ae985a0f0c76ebbb547ad2 11b35d1906a7277a3d64afe34224133b44327328 git Not specified
CNA Linux Linux affected c9aa889b035fca4598ae985a0f0c76ebbb547ad2 d1324b41dabd26787559efaeb430643c627c1eb0 git Not specified
CNA Linux Linux affected c9aa889b035fca4598ae985a0f0c76ebbb547ad2 393d687131d8aa8c7e4de2cb494438e145d20fc2 git Not specified
CNA Linux Linux affected 39db562b3fedb93978a7e42dd216b306740959f8 git Not specified
CNA Linux Linux affected 5.15.111 5.16 semver 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 6.12.111 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.53 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/80ac31cce55432034a9eb98262c92ace7866e494 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/11b35d1906a7277a3d64afe34224133b44327328 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fea33968592559a55a3f5a96a6386bebcaf988a8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d1324b41dabd26787559efaeb430643c627c1eb0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/393d687131d8aa8c7e4de2cb494438e145d20fc2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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