Symlink Following Affecting containernetworking-plugins-debugsource package, versions <1:1.4.0-6.module+el8.10.0+2001+6a33db9f


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
0.02% (5th percentile)

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  • Snyk IDSNYK-ROCKY8-CONTAINERNETWORKINGPLUGINSDEBUGSOURCE-14150187
  • published29 Nov 2025
  • disclosed6 Nov 2025

Introduced: 6 Nov 2025

NewCVE-2025-52881  (opens in a new tab)
CWE-61  (opens in a new tab)
CWE-363  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:8 containernetworking-plugins-debugsource to version 1:1.4.0-6.module+el8.10.0+2001+6a33db9f or higher.
This issue was patched in RLSA-2025:21232.

NVD Description

Note: Versions mentioned in the description apply only to the upstream containernetworking-plugins-debugsource package and not the containernetworking-plugins-debugsource package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:8 relevant fixed versions and status.

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

CVSS Base Scores

version 3.1