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.
References
Configurations
Configuration 1 (hide)
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History
03 Dec 2025, 18:30
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/opencontainers/runc/commit/1a30a8f3d921acbbb6a4bb7e99da2c05f8d48522 - Patch | |
| References | () https://github.com/opencontainers/runc/commit/5d7b2424072449872d1cd0c937f2ca25f418eb66 - Patch | |
| References | () https://github.com/opencontainers/runc/commit/8476df83b534a2522b878c0507b3491def48db9f - Patch | |
| References | () https://github.com/opencontainers/runc/commit/db19bbed5348847da433faa9d69e9f90192bfa64 - Patch | |
| References | () https://github.com/opencontainers/runc/security/advisories/GHSA-9493-h29p-rfm2 - Patch, Third Party Advisory, Mitigation | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| CPE | cpe:2.3:a:linuxfoundation:runc:1.4.0:rc1:*:*:*:*:*:* cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:* cpe:2.3:a:linuxfoundation:runc:1.4.0:rc2:*:*:*:*:*:* |
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| First Time |
Linuxfoundation
Linuxfoundation runc |
06 Nov 2025, 19:45
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-11-06 19:15
Updated : 2025-12-03 18:30
NVD link : CVE-2025-31133
Mitre link : CVE-2025-31133
CVE.ORG link : CVE-2025-31133
JSON object : View
Products Affected
linuxfoundation
- runc