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RHEL 9 : runc (RHSA-2025:20957)

high Nessus Plugin ID 274764

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Synopsis

The remote Red Hat host is missing one or more security updates for runc.

Description

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2025:20957 advisory.

 The runC tool is a lightweight, portable implementation of the Open Container Format (OCF) that provides container runtime.

 Security Fix(es):

 * runc: container escape via 'masked path' abuse due to mount race conditions (CVE-2025-31133)

 * runc: container escape with malicious config due to /dev/console mount and related races (CVE-2025-52565)

 * runc: container escape and denial of service due to arbitrary write gadgets and procfs write redirects (CVE-2025-52881)

 For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL runc package based on the guidance in RHSA-2025:20957.

See Also

https://access.redhat.com/security/updates/classification/#important

https://bugzilla.redhat.com/show_bug.cgi?id=2404705

https://bugzilla.redhat.com/show_bug.cgi?id=2404708

https://bugzilla.redhat.com/show_bug.cgi?id=2404715

http://www.nessus.org/u?f40d8f15

https://access.redhat.com/errata/RHSA-2025:20957

Plugin Details

Severity: High

ID: 274764

File Name: redhat-RHSA-2025-20957.nasl

Version: 1.1

Type: local

Agent: unix

Published: 11/11/2025

Updated: 11/11/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2025-52881

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.4

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.4

Threat Score: 7.1

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H

CVSS Score Source: CVE-2025-52565

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:runc

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/11/2025

Vulnerability Publication Date: 11/5/2025

Reference Information

CVE: CVE-2025-31133, CVE-2025-52565, CVE-2025-52881

CWE: 59

RHSA: 2025:20957