Detections
Analytics

CVE-2025-31133

high

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.

References

https://www.bleepingcomputer.com/news/security/dangerous-runc-flaws-could-allow-hackers-to-escape-docker-containers/

https://aws.amazon.com/security/security-bulletins/rss/aws-2025-024/

https://github.com/opencontainers/runc/security/advisories/GHSA-9493-h29p-rfm2

https://github.com/opencontainers/runc/commit/db19bbed5348847da433faa9d69e9f90192bfa64

https://github.com/opencontainers/runc/commit/8476df83b534a2522b878c0507b3491def48db9f

https://github.com/opencontainers/runc/commit/5d7b2424072449872d1cd0c937f2ca25f418eb66

https://github.com/opencontainers/runc/commit/1a30a8f3d921acbbb6a4bb7e99da2c05f8d48522

Details

Source: Mitre, NVD

Published: 2025-11-06

Updated: 2025-11-06

Risk Information

CVSS v2

Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.2

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Severity: High

CVSS v4

Base Score: 7.3

Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Severity: High

EPSS

EPSS: 0.0001