CVE-2025-52881runc is a CLI tool for spawning and running containers according to the OCI specification.
Updated under an hour ago ()
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It affects linuxfoundation runc. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-61, CWE-363
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Oct 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
linuxfoundation runc linuxfoundation:runc | before 1.2.8; from 1.3.0 before 1.3.3; 1.4.0; 1.4.0 | NVD |
References
- http://github.com/opencontainers/runc/commit/a41366e74080fa9f26a2cd3544e2801449697322patch
- http://github.com/opencontainers/runc/commit/fdcc9d3cad2f85954a241ccb910a61aaa1ef47f3patch
- https://github.com/opencontainers/runc/blob/v1.4.0-rc.2/RELEASES.mdpatch
- https://github.com/opencontainers/runc/commit/3f925525b44d247e390e529e772a0dc0c0bc3557patch
- https://github.com/opencontainers/runc/commit/435cc81be6b79cdec73b4002c0dae549b2f6ae6dpatch
- https://github.com/opencontainers/runc/commit/44a0fcf685db051c80b8c269812bb177f5802c58patch
- https://github.com/opencontainers/runc/commit/4b37cd93f86e72feac866442988b549b5b7bf3e6patch
- https://github.com/opencontainers/runc/commit/6fc191449109ea14bb7d61238f24a33fe08c651fpatch
- https://github.com/opencontainers/runc/commit/77889b56db939c323d29d1130f28f9aea2edb544patch
- https://github.com/opencontainers/runc/commit/77d217c7c3775d8ca5af89e477e81568ef4572dbpatch
- https://github.com/opencontainers/runc/commit/b3dd1bc562ed9996d1a0f249e056c16624046d28patch
- https://github.com/opencontainers/runc/commit/d40b3439a9614a86e87b81a94c6811ec6fa2d7d2patch
- https://github.com/opencontainers/runc/commit/d61fd29d854b416feaaf128bf650325cd2182165patch
- https://github.com/opencontainers/runc/commit/db19bbed5348847da433faa9d69e9f90192bfa64patch
- https://github.com/opencontainers/runc/commit/ed6b1693b8b3ae7eb0250a7e76fc888cdacf98c1patch
- https://github.com/opencontainers/runc/commit/ff6fe1324663538167eca8b3d3eec61e1bd4fa51patch
- https://github.com/opencontainers/runc/commit/ff94f9991bd32076c871ef0ad8bc1b763458e480patch
- https://github.com/opencontainers/runc/security/advisories/GHSA-9493-h29p-rfm2patch, third-party-advisory
- https://github.com/opencontainers/runc/security/advisories/GHSA-cgrx-mc8f-2prmexploit, mitigation, patch, third-party-advisory
- https://github.com/opencontainers/runc/security/advisories/GHSA-qw9x-cqr3-wc7rpatch, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.