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.
References
Configurations
Configuration 1 (hide)
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History
03 Dec 2025, 18:37
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:linuxfoundation:runc:1.4.0:rc1:*:*:*:*:*:* cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:* cpe:2.3:a:linuxfoundation:runc:1.4.0:rc2:*:*:*:*:*:* |
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| References | () http://github.com/opencontainers/runc/commit/a41366e74080fa9f26a2cd3544e2801449697322 - Patch | |
| References | () http://github.com/opencontainers/runc/commit/fdcc9d3cad2f85954a241ccb910a61aaa1ef47f3 - Patch | |
| References | () https://github.com/opencontainers/runc/blob/v1.4.0-rc.2/RELEASES.md - Patch | |
| References | () https://github.com/opencontainers/runc/commit/3f925525b44d247e390e529e772a0dc0c0bc3557 - Patch | |
| References | () https://github.com/opencontainers/runc/commit/435cc81be6b79cdec73b4002c0dae549b2f6ae6d - Patch | |
| References | () https://github.com/opencontainers/runc/commit/44a0fcf685db051c80b8c269812bb177f5802c58 - Patch | |
| References | () https://github.com/opencontainers/runc/commit/4b37cd93f86e72feac866442988b549b5b7bf3e6 - Patch | |
| References | () https://github.com/opencontainers/runc/commit/6fc191449109ea14bb7d61238f24a33fe08c651f - Patch | |
| References | () https://github.com/opencontainers/runc/commit/77889b56db939c323d29d1130f28f9aea2edb544 - Patch | |
| References | () https://github.com/opencontainers/runc/commit/77d217c7c3775d8ca5af89e477e81568ef4572db - Patch | |
| References | () https://github.com/opencontainers/runc/commit/b3dd1bc562ed9996d1a0f249e056c16624046d28 - Patch | |
| References | () https://github.com/opencontainers/runc/commit/d40b3439a9614a86e87b81a94c6811ec6fa2d7d2 - Patch | |
| References | () https://github.com/opencontainers/runc/commit/d61fd29d854b416feaaf128bf650325cd2182165 - Patch | |
| References | () https://github.com/opencontainers/runc/commit/db19bbed5348847da433faa9d69e9f90192bfa64 - Patch | |
| References | () https://github.com/opencontainers/runc/commit/ed6b1693b8b3ae7eb0250a7e76fc888cdacf98c1 - Patch | |
| References | () https://github.com/opencontainers/runc/commit/ff6fe1324663538167eca8b3d3eec61e1bd4fa51 - Patch | |
| References | () https://github.com/opencontainers/runc/commit/ff94f9991bd32076c871ef0ad8bc1b763458e480 - Patch | |
| References | () https://github.com/opencontainers/runc/security/advisories/GHSA-9493-h29p-rfm2 - Third Party Advisory, Patch | |
| References | () https://github.com/opencontainers/runc/security/advisories/GHSA-cgrx-mc8f-2prm - Third Party Advisory, Exploit, Mitigation, Patch | |
| References | () https://github.com/opencontainers/runc/security/advisories/GHSA-qw9x-cqr3-wc7r - Third Party Advisory, Patch | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.5 |
| First Time |
Linuxfoundation
Linuxfoundation runc |
06 Nov 2025, 21:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-11-06 21:15
Updated : 2025-12-03 18:37
NVD link : CVE-2025-52881
Mitre link : CVE-2025-52881
CVE.ORG link : CVE-2025-52881
JSON object : View
Products Affected
linuxfoundation
- runc
