In 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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00175.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
2f2dc053404febedc9c273452d9d518fb31fde72 affected < 2b2515b8095cf2149bef44383a99d5b5677f1831
2f2dc053404febedc9c273452d9d518fb31fde72 affected < 448875a73e16ba7d81dec9274ce9d33a12d092fb
2f2dc053404febedc9c273452d9d518fb31fde72 affected < ae6e935618d99cdba11eab4714092e7e5f13cf7e
2f2dc053404febedc9c273452d9d518fb31fde72 affected < aaf67de78807c59c35bafb5003d4fb457c764800
Linux Linux affected
Version Status Constraints
2.6.34 affected —
0 unaffected < 2.6.34
6.1.28 unaffected ≤ 6.1.*
6.2.15 unaffected ≤ 6.2.*
6.3.2 unaffected ≤ 6.3.*
6.4 unaffected ≤ *

No data.

No data.

No data.

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Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/2b2515b8095cf2149bef44383a99d5b5677f1831 cve-icon cve-icon
https://git.kernel.org/stable/c/448875a73e16ba7d81dec9274ce9d33a12d092fb cve-icon cve-icon
https://git.kernel.org/stable/c/aaf67de78807c59c35bafb5003d4fb457c764800 cve-icon cve-icon
https://git.kernel.org/stable/c/ae6e935618d99cdba11eab4714092e7e5f13cf7e cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025122422-CVE-2023-53867-cb3e@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2023-53867 cve-icon
https://www.cve.org/CVERecord?id=CVE-2023-53867 cve-icon
History

Tue, 04 Aug 2026 09:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

 cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Thu, 25 Dec 2025 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Low

Wed, 24 Dec 2025 11:15:00 +0000

Type Values Removed Values Added
Description In 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.
Title ceph: fix potential use-after-free bug when trimming caps
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-04T09:17:03.663Z

Reserved: 2025-12-09T01:27:17.829Z

Link: CVE-2023-53867

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2025-12-24T11:15:51.387

Modified: 2026-06-17T06:46:12.953

Link: CVE-2023-53867

cve-icon Redhat

Severity : Low

Publid Date: 2025-12-24T00:00:00Z

Links: CVE-2023-53867 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.