ceph: fix potential use-after-free bug when trimming caps

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2023-53867
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-12-24 11:15:51 UTC
Updated2026-10-15 22:17:50 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ceph: fix potential use-after-free bug when trimming caps When trimming the caps and just after the 'session->s_cap_lock' is released in ceph_iterate_session_caps() the cap maybe removed by another thread, and when using the stale cap memory in the callbacks it will trigger use-after-free crash. We need to check the existence of the cap just after the 'ci->i_ceph_lock' being acquired. And do nothing if it's already removed.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.005320000 probability, percentile 0.436810000 (date 2026-10-15)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 2f2dc053404febedc9c273452d9d518fb31fde72 2b2515b8095cf2149bef44383a99d5b5677f1831 git Not specified
CNA Linux Linux affected 2f2dc053404febedc9c273452d9d518fb31fde72 448875a73e16ba7d81dec9274ce9d33a12d092fb git Not specified
CNA Linux Linux affected 2f2dc053404febedc9c273452d9d518fb31fde72 ae6e935618d99cdba11eab4714092e7e5f13cf7e git Not specified
CNA Linux Linux affected 2f2dc053404febedc9c273452d9d518fb31fde72 aaf67de78807c59c35bafb5003d4fb457c764800 git Not specified
CNA Linux Linux affected 2.6.34 Not specified
CNA Linux Linux unaffected 2.6.34 semver Not specified
CNA Linux Linux unaffected 6.1.28 6.1.* semver Not specified
CNA Linux Linux unaffected 6.2.15 6.2.* semver Not specified
CNA Linux Linux unaffected 6.3.2 6.3.* semver Not specified
CNA Linux Linux unaffected 6.4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/2b2515b8095cf2149bef44383a99d5b5677f1831 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ae6e935618d99cdba11eab4714092e7e5f13cf7e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/aaf67de78807c59c35bafb5003d4fb457c764800 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/448875a73e16ba7d81dec9274ce9d33a12d092fb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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