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CVE-2025-31133
Good to know:
Date: November 6, 2025
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.
Severity Score
Related Resources (8)
Severity Score
Weakness Type (CWE)
Top Fix
Upgrade Version
Upgrade to version github.com/opencontainers/runc - v1.2.8;github.com/opencontainers/runc - v1.3.3;github.com/opencontainers/runc - v1.4.0-rc.3;github.com/opencontainers/runc - v1.2.8;github.com/opencontainers/runc - v1.3.3;https://github.com/opencontainers/runc.git - v1.3.3;https://github.com/opencontainers/runc.git - v1.4.0-rc.3;https://github.com/opencontainers/runc.git - v1.2.8
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | NONE |
| User Interaction (UI): | NONE |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | NONE |
| Integrity (I): | NONE |
| Availability (A): | HIGH |