Vulnerability Description
runc is a CLI tool for spawning and running containers according to the OCI specification. In versions 1.2.7 and below, 1.3.0-rc.1 through 1.3.1, 1.4.0-rc.1 and 1.4.0-rc.2 files, runc would not perform sufficient verification that the source of the bind-mount (i.e., the container's /dev/null) was actually a real /dev/null inode when using the container's /dev/null to mask. This exposes two methods of attack: an arbitrary mount gadget, leading to host information disclosure, host denial of service, container escape, or a bypassing of maskedPaths. This issue is fixed in versions 1.2.8, 1.3.3 and 1.4.0-rc.3.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linuxfoundation | Runc | < 1.2.8 |
Related Weaknesses (CWE)
References
- https://github.com/opencontainers/runc/commit/1a30a8f3d921acbbb6a4bb7e99da2c05f8Patch
- https://github.com/opencontainers/runc/commit/5d7b2424072449872d1cd0c937f2ca25f4Patch
- https://github.com/opencontainers/runc/commit/8476df83b534a2522b878c0507b3491defPatch
- https://github.com/opencontainers/runc/commit/db19bbed5348847da433faa9d69e9f9019Patch
- https://github.com/opencontainers/runc/security/advisories/GHSA-9493-h29p-rfm2MitigationPatchThird Party Advisory
FAQ
What is CVE-2025-31133?
CVE-2025-31133 is a vulnerability with a CVSS score of 7.8 (HIGH). runc is a CLI tool for spawning and running containers according to the OCI specification. In versions 1.2.7 and below, 1.3.0-rc.1 through 1.3.1, 1.4.0-rc.1 and 1.4.0-rc.2 files, runc would not perfor...
How severe is CVE-2025-31133?
CVE-2025-31133 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-31133?
Check the references section above for vendor advisories and patch information. Affected products include: Linuxfoundation Runc.