Critical 9.8Published Dec 24, 2025

CVE-2023-53867ceph: fix potential use-after-free bug when trimming caps

Updated under an hour ago (Oct 26, 2026, 1:23 PM ET)

Does this affect you?

It affects Linux. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	2f2dc053404febedc9c273452d9d518fb31fde72 builds before 2b2515b8095cf2149bef44383a99d5b5677f1831; from 2f2dc053404febedc9c273452d9d518fb31fde72 before 448875a73e16ba7d81dec9274ce9d33a12d092fb; from 2f2dc053404febedc9c273452d9d518fb31fde72 before ae6e935618d99cdba11eab4714092e7e5f13cf7e; from 2f2dc053404febedc9c273452d9d518fb31fde72 before aaf67de78807c59c35bafb5003d4fb457c764800	CNA record

References

References

https://git.kernel.org/stable/c/2b2515b8095cf2149bef44383a99d5b5677f1831
https://git.kernel.org/stable/c/448875a73e16ba7d81dec9274ce9d33a12d092fb
https://git.kernel.org/stable/c/ae6e935618d99cdba11eab4714092e7e5f13cf7e
https://git.kernel.org/stable/c/aaf67de78807c59c35bafb5003d4fb457c764800

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.