CVE-2023-53867 Details
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.
A use-after-free vulnerability has been identified in the Ceph file system component of the Linux kernel. This issue arises when the kernel trims capability references. After releasing the lock on session capabilities, a capability may be removed by another thread. If the callback functions then use this stale capability reference, it can lead to a crash. The vulnerability is present in the Linux kernel's stable releases, specifically within the Ceph file system's handling of metadata server (MDS) capabilities.
Users can upgrade to the latest stable version of the Linux kernel to address this vulnerability. The specific commit that fixes this issue is available in the Linux kernel stable tree.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Dec 24, 2025References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/2b2515b8095cf2149bef44383a99d5b5677f1831 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/448875a73e16ba7d81dec9274ce9d33a12d092fb | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/aaf67de78807c59c35bafb5003d4fb457c764800 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/ae6e935618d99cdba11eab4714092e7e5f13cf7e | kernel.org | Source CodeVendor |
Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
| Product | Versions |
|---|---|
| Linux kernel | All versions |
CPE
Remediation
| |
| Ceph | All versions |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 4, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | kernel.org |
| Dec 24, 2025 | New CVE Received | kernel.org |