Alibaba Cloud Linux 3 : 0003: container-tools:an8 (ALINUX3-SA-2026:0003)

high Nessus Plugin ID 282341

Synopsis

The remote Alibaba Cloud Linux host is missing one or more security updates.

Description

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by a vulnerability as referenced in the ALINUX3-SA-2026:0003 advisory.

Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

CVE-2025-52881:
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.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

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 packages.

Plugin Details

Severity: High

ID: 282341

File Name: alinux3_sa_2026-0003.nasl

Version: 1.1

Type: local

Family: Alibaba Cloud Linux Local Security Checks

Published: 1/7/2026

Updated: 1/7/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

CVSS v2

Risk Factor: Medium

Base Score: 6

Temporal Score: 4.7

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

CVSS Score Source: CVE-2025-52881

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:L/AC:H/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: 7.3

Threat Score: 5.9

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

CPE: cpe:/o:alibabacloud:alibaba_cloud_linux_3, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:podman, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:podman-catatonit, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:podman-docker, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:podman-gvproxy, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:podman-plugins, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:podman-remote, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:podman-tests, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:runc, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:buildah, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:buildah-tests, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:skopeo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:skopeo-tests

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/5/2026

Vulnerability Publication Date: 11/5/2025

Reference Information

CVE: CVE-2025-52881

Detections

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