CVE-2025-52881
CVE-2025-52881 · runc: LSM labels can be bypassed with malicious config using dummy procfs files
This page contains facts from public vulnerability sources. Check the original advisory before updating.
runc is a CLI tool for spawning and running containers according to the OCI specification. In versions 1.2.7, 1.3.2 and 1.4.0-rc.2, an attacker can trick runc into misdirecting writes to /proc to other procfs files through the use of a racing container with shared mounts (we have also verified this attack is possible to exploit using a standard Dockerfile with docker buildx build as that also permits triggering parallel execution of containers with custom shared mounts configured). This redirect could be through symbolic links in a tmpfs or theoretically other methods such as regular bind-mounts. While similar, the mitigation applied for the related CVE, CVE-2019-19921, was fairly limited and effectively only caused runc to verify that when LSM labels are written they are actually procfs files. This issue is fixed in versions 1.2.8, 1.3.3, and 1.4.0-rc.3.
CVSS 7.3 · High · EPSS 0.6% · Fix available
- Published
- Updated
Stack: system · containers
Affected products and versions
runc
- Versions
- <= 1.2.7, < 1.2.8: Affected
- <= 1.3.2, < 1.3.3: Affected
- <= 1.4.0-rc.2, < 1.4.0-rc.3: Affected
No fix published
runc Debian:12
- Versions
- 1.1.10+ds1-1
- 1.1.12+ds1-1
- 1.1.12+ds1-2
- 1.1.12+ds1-3
- 1.1.12+ds1-4
- 1.1.12+ds1-5
- 1.1.12+ds1-5.1
- 1.1.15+ds1-1
- 1.1.15+ds1-2
- 1.1.5+ds1-1
- 1.1.5+ds1-1+deb12u1
- 1.1.5+ds1-2
- 1.1.5+ds1-3
- 1.1.5+ds1-4
- 1.1.5+ds1-5
- 1.3.0+ds1-1
- 1.3.0+ds1-2
- 1.3.0+ds1-3
- 1.3.0+ds1-4
- 1.3.2+ds1-1
- 1.3.3+ds1-1
- 1.3.3+ds1-2
- 1.3.3+ds1-3
- 1.3.5+ds1-1
- 1.3.6+ds1-1
- 1.4.3+ds1-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
runc Debian:13
- Versions
- 1.1.15+ds1-2
- 1.3.0+ds1-1
- 1.3.0+ds1-2
- 1.3.0+ds1-3
- 1.3.0+ds1-4
- 1.3.2+ds1-1
- 1.3.3+ds1-1
- 1.3.3+ds1-2
- 1.3.3+ds1-3
- 1.3.5+ds1-1
- 1.3.6+ds1-1
- 1.4.3+ds1-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
runc Debian:14
- Versions
- 1.1.15+ds1-2
- 1.3.0+ds1-1
- 1.3.0+ds1-2
- 1.3.0+ds1-3
- 1.3.0+ds1-4
- 1.3.2+ds1-1
- 1.3.3+ds1-1
- Affected ranges
- ECOSYSTEM: < 1.3.3+ds1-2
Update to 1.3.3+ds1-2
runc Ubuntu:Pro:16.04:LTS
- Versions
- 0.0.8+dfsg-2
- 0.1.1-0ubuntu5~16.04
- 1.0.0~rc1-0ubuntu1~16.04
- 1.0.0~rc1-0ubuntu2~16.04.1
- 1.0.0~rc1-0ubuntu2~16.04.1.1
- 1.0.0~rc2-0ubuntu2~16.04.1
- 1.0.0~rc2+docker1.12.6-0ubuntu1~16.04.1
- 1.0.0~rc2+docker1.13.1-0ubuntu1~16.04.1
- 1.0.0~rc2+docker1.13.1-0ubuntu1~16.04.2
- 1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.3
- 1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4
- 1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm1
- 1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm2
- 1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
runc Ubuntu:Pro:18.04:LTS
- Versions
- 1.0.0~rc2+docker1.13.1-0ubuntu1
- 1.0.0~rc4+dfsg1-2
- 1.0.0~rc4+dfsg1-6
- 1.0.0~rc4+dfsg1-6ubuntu0.18.04.1
- 1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.1
- 1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.2
- 1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.2+esm1
- 1.0.0~rc10-0ubuntu1~18.04.1
- 1.0.0~rc10-0ubuntu1~18.04.2
- 1.0.0~rc93-0ubuntu1~18.04.1
- 1.0.0~rc93-0ubuntu1~18.04.2
- 1.0.0~rc95-0ubuntu1~18.04.1
- 1.0.0~rc95-0ubuntu1~18.04.2
- 1.0.1-0ubuntu2~18.04.1
- 1.1.0-0ubuntu1~18.04.1
- 1.1.4-0ubuntu1~18.04.1
- 1.1.4-0ubuntu1~18.04.2
- 1.1.4-0ubuntu1~18.04.2+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
runc Ubuntu:20.04:LTS
- Versions
- 1.0.0~rc8+git20190923.3e425f80-0ubuntu1
- 1.0.0~rc10-0ubuntu1
- 1.0.0~rc93-0ubuntu1~20.04.1
- 1.0.0~rc93-0ubuntu1~20.04.2
- 1.0.0~rc95-0ubuntu1~20.04.1
- 1.0.0~rc95-0ubuntu1~20.04.2
- 1.0.1-0ubuntu2~20.04.1
- 1.1.0-0ubuntu1~20.04.1
- 1.1.0-0ubuntu1~20.04.2
- 1.1.4-0ubuntu1~20.04.1
- 1.1.4-0ubuntu1~20.04.2
- 1.1.4-0ubuntu1~20.04.3
- 1.1.7-0ubuntu1~20.04.1
- 1.1.7-0ubuntu1~20.04.2
- 1.1.7-0ubuntu1~20.04.4
- 1.1.7-0ubuntu1~20.04.5
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
runc-app Ubuntu:20.04:LTS
- Versions
- 1.1.12-0ubuntu2~20.04.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
runc Ubuntu:22.04:LTS
- Versions
- 1.0.1-0ubuntu2
- 1.0.1-0ubuntu3
- 1.0.3-0ubuntu1
- 1.1.0-0ubuntu1
- 1.1.0-0ubuntu1.1
- 1.1.4-0ubuntu1~22.04.1
- 1.1.4-0ubuntu1~22.04.2
- 1.1.4-0ubuntu1~22.04.3
- 1.1.7-0ubuntu1~22.04.1
- 1.1.7-0ubuntu1~22.04.2
- 1.1.7-0ubuntu1~22.04.4
- 1.1.7-0ubuntu1~22.04.5
- 1.1.7-0ubuntu1~22.04.6
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
runc-app Ubuntu:22.04:LTS
- Versions
- 1.1.12-0ubuntu2~22.04.1
- 1.2.5-0ubuntu1~22.04.1
- 1.3.0-0ubuntu2~22.04.1
- Affected ranges
- ECOSYSTEM: < 1.3.3-0ubuntu1~22.04.2
Update to 1.3.3-0ubuntu1~22.04.2
runc Ubuntu:24.04:LTS
- Versions
- 1.1.7-0ubuntu2
- 1.1.10+ds1-1ubuntu1
- 1.1.10+ds1-1ubuntu2
- 1.1.12+ds1-1ubuntu1
- 1.1.12+ds1-2ubuntu1
- 1.1.12+ds1-2ubuntu1.1
- 1.1.12+ds1-2ubuntu1.2
- 1.1.12+ds1-2ubuntu1.3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
runc-app Ubuntu:24.04:LTS
- Versions
- 1.1.10-0ubuntu1
- 1.1.12-0ubuntu1
- 1.1.12-0ubuntu2
- 1.1.12-0ubuntu3
- 1.1.12-0ubuntu3.1
- 1.2.5-0ubuntu1~24.04.1
- 1.3.0-0ubuntu2~24.04.1
- Affected ranges
- ECOSYSTEM: < 1.3.3-0ubuntu1~24.04.2
Update to 1.3.3-0ubuntu1~24.04.2
runc Ubuntu:25.10
- Versions
- 1.1.15+ds1-2ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
runc-app Ubuntu:25.10
- Versions
- 1.2.5-0ubuntu1
- 1.3.0-0ubuntu1
- 1.3.0-0ubuntu2
- Affected ranges
- ECOSYSTEM: < 1.3.3-0ubuntu1~25.10.2
Update to 1.3.3-0ubuntu1~25.10.2
runc-stable Ubuntu:25.10
- Versions
- 1.3.0-0ubuntu1
- Affected ranges
- ECOSYSTEM: < 1.3.3-0ubuntu1~25.10.2
Update to 1.3.3-0ubuntu1~25.10.2
Original sources
- https://github.com/opencontainers/runc/security/advisories/GHSA-cgrx-mc8f-2prm
- https://github.com/opencontainers/runc/security/advisories/GHSA-qw9x-cqr3-wc7r
- https://github.com/opencontainers/runc/security/advisories/GHSA-9493-h29p-rfm2
- https://github.com/opencontainers/runc/commit/ff94f9991bd32076c871ef0ad8bc1b763458e480
- https://github.com/opencontainers/runc/commit/ff6fe1324663538167eca8b3d3eec61e1bd4fa51
- https://github.com/opencontainers/runc/commit/ed6b1693b8b3ae7eb0250a7e76fc888cdacf98c1
- https://github.com/opencontainers/runc/commit/db19bbed5348847da433faa9d69e9f90192bfa64
- https://github.com/opencontainers/runc/commit/d61fd29d854b416feaaf128bf650325cd2182165
- https://github.com/opencontainers/runc/commit/d40b3439a9614a86e87b81a94c6811ec6fa2d7d2
- https://github.com/opencontainers/runc/commit/b3dd1bc562ed9996d1a0f249e056c16624046d28
- https://github.com/opencontainers/runc/commit/77d217c7c3775d8ca5af89e477e81568ef4572db
- https://github.com/opencontainers/runc/commit/77889b56db939c323d29d1130f28f9aea2edb544
- https://github.com/opencontainers/runc/commit/6fc191449109ea14bb7d61238f24a33fe08c651f
- https://github.com/opencontainers/runc/commit/4b37cd93f86e72feac866442988b549b5b7bf3e6
- https://github.com/opencontainers/runc/commit/44a0fcf685db051c80b8c269812bb177f5802c58
- https://github.com/opencontainers/runc/commit/435cc81be6b79cdec73b4002c0dae549b2f6ae6d
- https://github.com/opencontainers/runc/commit/3f925525b44d247e390e529e772a0dc0c0bc3557
- https://github.com/opencontainers/runc/blob/v1.4.0-rc.2/RELEASES.md
- http://github.com/opencontainers/runc/commit/a41366e74080fa9f26a2cd3544e2801449697322
- http://github.com/opencontainers/runc/commit/fdcc9d3cad2f85954a241ccb910a61aaa1ef47f3
- https://nvd.nist.gov/vuln/detail/CVE-2025-52881