Symlink Following Affecting rancher-2.10 package, versions <2.10.10-r3


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.03% (7th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-RANCHER210-13862269
  • published9 Nov 2025
  • disclosed6 Nov 2025

Introduced: 6 Nov 2025

CVE-2025-31133  (opens in a new tab)
CWE-61  (opens in a new tab)
CWE-363  (opens in a new tab)

How to fix?

Upgrade Chainguard rancher-2.10 to version 2.10.10-r3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rancher-2.10 package and not the rancher-2.10 package as distributed by Chainguard. See How to fix? for Chainguard 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 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.

CVSS Base Scores

version 3.1