Link Following Affecting runc package, versions <4:1.2.5-3.el9_6


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.01% (1st percentile)

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  • Snyk IDSNYK-RHEL9-RUNC-13863442
  • published9 Nov 2025
  • disclosed5 Nov 2025

Introduced: 5 Nov 2025

NewCVE-2025-52565  (opens in a new tab)
CWE-59  (opens in a new tab)

How to fix?

Upgrade RHEL:9 runc to version 4:1.2.5-3.el9_6 or higher.
This issue was patched in RHSA-2025:19927.

NVD Description

Note: Versions mentioned in the description apply only to the upstream runc package and not the runc package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

runc is a CLI tool for spawning and running containers according to the OCI specification. Versions 1.0.0-rc3 through 1.2.7, 1.3.0-rc.1 through 1.3.2, and 1.4.0-rc.1 through 1.4.0-rc.2, due to insufficient checks when bind-mounting /dev/pts/$n to /dev/console inside the container, an attacker can trick runc into bind-mounting paths which would normally be made read-only or be masked onto a path that the attacker can write to. This attack is very similar in concept and application to CVE-2025-31133, except that it attacks a similar vulnerability in a different target (namely, the bind-mount of /dev/pts/$n to /dev/console as configured for all containers that allocate a console). This happens after pivot_root(2), so this cannot be used to write to host files directly -- however, as with CVE-2025-31133, this can load to denial of service of the host or a container breakout by providing the attacker with a writable copy of /proc/sysrq-trigger or /proc/sys/kernel/core_pattern (respectively). This issue is fixed in versions 1.2.8, 1.3.3 and 1.4.0-rc.3.

CVSS Base Scores

version 3.1