| Name | CVE-2025-31133 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1120140 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| runc (PTS) | bullseye | 1.0.0~rc93+ds1-5+deb11u5 | vulnerable |
| bullseye (security) | 1.0.0~rc93+ds1-5+deb11u3 | vulnerable | |
| bookworm, bookworm (security) | 1.1.5+ds1-1+deb12u1 | vulnerable | |
| trixie | 1.1.15+ds1-2 | vulnerable | |
| forky, sid | 1.3.3+ds1-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| runc | source | experimental | 1.3.3+ds1-1 | |||
| runc | source | (unstable) | 1.3.3+ds1-2 | 1120140 |
https://github.com/opencontainers/runc/security/advisories/GHSA-9493-h29p-rfm2
https://www.openwall.com/lists/oss-security/2025/11/05/3