apparmor: fix refcount leak when updating the sk_ctx

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72461
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:20 UTC
Updated2026-08-17 06:19:13 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: apparmor: fix refcount leak when updating the sk_ctx Currently update_sk_ctx() transfers the plabel reference, unfortunately it is also unconditionally put in the caller. Ideally we would make the caller conditionally put the reference based on whether it was transferred but for now just fix the bug by getting a reference.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001360000 probability, percentile 0.035430000 (date 2026-08-17)

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

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 88fec3526e84123997ecebd6bb6778eb4ce779b7 045dbe89ac31709abd73390d0805d52fece7ef39 git Not specified
CNA Linux Linux affected 88fec3526e84123997ecebd6bb6778eb4ce779b7 b8642f1478982a97ca2eb59f70f631a9de42ae11 git Not specified
CNA Linux Linux affected 88fec3526e84123997ecebd6bb6778eb4ce779b7 6d25e7b47616cb2db43351210929c8f19dc305a3 git Not specified
CNA Linux Linux affected 6.17 Not specified
CNA Linux Linux unaffected 6.17 semver Not specified
CNA Linux Linux unaffected 6.18.40 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/b8642f1478982a97ca2eb59f70f631a9de42ae11 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6d25e7b47616cb2db43351210929c8f19dc305a3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/045dbe89ac31709abd73390d0805d52fece7ef39 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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