What is CVE-2023-53867?

CVE-2023-53867 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10, affecting Linux kernel versions from 2.6.34 onward and patched in 6.1.28, 6.2.15, 6.3.2 and others. CVE-2023-53867 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53867?

CVE-2023-53867 has a CVSS score of 9.8 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2023-53867?

Yes, CVE-2023-53867 has been patched. Fixed versions include 6.1.28, 6.2.15, 6.3.2 and others. If you are running Linux kernel 2.6.34 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53867 actively exploited?

CVE-2023-53867 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53867

Critical

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.

Package Linux Kernel

Published 2025-12-24

Last modified 2026-08-04

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

9.8

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 2.6.34 and later are affected. Fixed in 6.1.28, 6.2.15, 6.3.2, 6.4 and their respective stable series.

Affected from

≥ 2.6.34

Fixed in

✓ 6.1.28 6.1.x ✓ 6.2.15 6.2.x ✓ 6.3.2 6.3.x ✓ 6.4

References

4 total

Details

CVE ID CVE-2023-53867

Severity Critical

CVSS score 9.8 / 10

CVSS version 3.1

Published 2025-12-24

Modified 2026-08-04

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53867?

CVE-2023-53867 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10 . It affects Linux kernel versions from 2.6.34 onward and has been patched in 6.1.28, 6.2.15, 6.3.2 and others. CVE-2023-53867 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53867?

CVE-2023-53867 has a CVSS score of 9.8 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2023-53867?

Yes. CVE-2023-53867 has been patched. Fixed versions include 6.1.28, 6.2.15, 6.3.2 and others. If you are running Linux kernel 2.6.34 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53867 actively exploited?

No. CVE-2023-53867 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.