AUGUST 4, 2026
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Case File

CVE-2023-53867

CRITICAL · CVSS 9.8 EPSS 0.18%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2025-12-24 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.8. It affects Linux.

CVE
CVE-2023-53867
Severity
CRITICAL
CVSS
9.8
EPSS
0.18%
Linux

Original NVD 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.