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AlmaLinux 9.2 [TuxCare] Security Update: runc (ALMALINUX9.2:CLSA-2026:1791543621)

medium Nessus Plugin ID 364438

Synopsis

The AlmaLinux host is missing one or more security updates.

Description

The AlmaLinux 9.2 host has a package installed that is affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1791543621 advisory.

 - Previously, resolving relative paths containing parent directory ('..') segments performed string conversions and buffer rewrites on each step, resulting in quadratic time complexity and high memory allocation overhead. Now, path resolution operates on a byte buffer using index-based backtracking for '..' segments, eliminating the quadratic time complexity and significantly reducing memory allocations.
 (CVE-2026-56860)

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

Solution

Update the affected runc package based on the guidance in TuxCare advisory ALMALINUX9.2:CLSA-2026:1791543621.

See Also

https://cve.tuxcare.com/els/releases/CLSA-2026:1791543621

http://www.nessus.org/u?5db46977

Plugin Details

Severity: Medium

ID: 364438

File Name: tuxcare_alma_linux_9.2_CLSA-2026-1791543621.nasl

Version: 1.1

Type: Local

Published: 10/9/2026

Updated: 10/9/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.65

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-56860

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

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

Vulnerability Information

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list, Host/OS/extended-third-party

Exploit Ease: No known exploits are available

Patch Publication Date: 10/9/2026

Vulnerability Publication Date: 8/13/2026

Reference Information

CVE: CVE-2026-56860

CLSA: 2026:1791543621