CVE-2025-52555 CephFS Permission Escalation Vulnerability in Ceph Fuse mounted FS
An unprivileged user can escalate to root privileges in a ceph-fuse mounted CephFS by changing directory permissions, allowing full access to root-owned files.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-52555?
CVE-2025-52555 is a medium-severity vulnerability in ceph, published on 26 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Ceph is a distributed object, block, and file storage platform. In versions 17.2.7, 18.2.1 through 18.2.4, and 19.0.0 through 19.2.2, an unprivileged user can escalate to root privileges in a ceph-fuse mounted CephFS by chmod 777 a directory owned by root to gain access. The result of this is that a user could read, write and execute to any directory owned by root as long as they chmod 777 it. This impacts confidentiality, integrity, and availability. It is patched in versions 17.2.8, 18.2.5, and 19.2.3.
Weakness: CWE-269
Which versions are affected by CVE-2025-52555?
1 open source package ship an affected version, including ceph.
| Package | Affected | Fixed in |
|---|---|---|
ceph Bitnami | From 17.2.7 | 17.2.8, 18.2.5, 19.2.3 |
How do I fix CVE-2025-52555?
Upgrade ceph to a fixed version for your release line: 17.2.8, 18.2.5 or 19.2.3.
Is CVE-2025-52555 being exploited?
There is no known exploitation of CVE-2025-52555 in the wild and no public exploit code.
Sources
Also known as AZL-64386, BIT-ceph-2025-52555, DEBIAN-CVE-2025-52555, ECHO-096d-8796-1abe, GHSA-89hm-qq33-2fjm, MGASA-2025-0222 and 3 more.