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Linux Distros Unpatched Vulnerability : CVE-2026-56857

critical Nessus Plugin ID 369119

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - On Windows, when the target of Root.Mkdir or Root.MkdirAll is a junction pointing to an empty location, the operation can create a directory at the junction target even when that target is located outside the root. This only applies to operations where the last path component is a junction (path/to/junction, but not path/junction/target). (CVE-2026-56857)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-56857

https://ubuntu.com/security/CVE-2026-56857

Plugin Details

Severity: Critical

ID: 369119

File Name: unpatched_CVE_2026_56857.nasl

Version: 1.2

Type: Local

Agent: unix

Family: Misc.

Published: 10/21/2026

Updated: 10/23/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.49

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.1

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

CVSS Score Source: CVE-2026-56857

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:golang-1.10, p-cpe:/a:canonical:ubuntu_linux:golang-1.13, p-cpe:/a:canonical:ubuntu_linux:golang-1.14, p-cpe:/a:canonical:ubuntu_linux:golang-1.16, p-cpe:/a:canonical:ubuntu_linux:golang-1.17, p-cpe:/a:canonical:ubuntu_linux:golang-1.18, p-cpe:/a:canonical:ubuntu_linux:golang-1.20, p-cpe:/a:canonical:ubuntu_linux:golang-1.21, p-cpe:/a:canonical:ubuntu_linux:golang-1.23, p-cpe:/a:canonical:ubuntu_linux:golang-1.24, p-cpe:/a:canonical:ubuntu_linux:golang-1.25, p-cpe:/a:canonical:ubuntu_linux:golang-1.26, p-cpe:/a:canonical:ubuntu_linux:golang-1.27, p-cpe:/a:canonical:ubuntu_linux:golang-1.6, p-cpe:/a:canonical:ubuntu_linux:golang-1.8, p-cpe:/a:canonical:ubuntu_linux:golang-1.9, p-cpe:/a:redhat:enterprise_linux:buildah-tests, p-cpe:/a:redhat:enterprise_linux:buildah, p-cpe:/a:redhat:enterprise_linux:containernetworking-plugins, p-cpe:/a:redhat:enterprise_linux:go-toolset, p-cpe:/a:redhat:enterprise_linux:golang-bin, p-cpe:/a:redhat:enterprise_linux:golang-docs, p-cpe:/a:redhat:enterprise_linux:golang-github-cpuguy83-md2man, p-cpe:/a:redhat:enterprise_linux:golang-misc, p-cpe:/a:redhat:enterprise_linux:golang-race, p-cpe:/a:redhat:enterprise_linux:golang-src, p-cpe:/a:redhat:enterprise_linux:golang-tests, p-cpe:/a:redhat:enterprise_linux:golang, p-cpe:/a:redhat:enterprise_linux:podman-catatonit, p-cpe:/a:redhat:enterprise_linux:podman-docker, p-cpe:/a:redhat:enterprise_linux:podman-gvproxy, p-cpe:/a:redhat:enterprise_linux:podman-plugins, p-cpe:/a:redhat:enterprise_linux:podman-remote, p-cpe:/a:redhat:enterprise_linux:podman-tests, p-cpe:/a:redhat:enterprise_linux:podman, p-cpe:/a:redhat:enterprise_linux:runc, p-cpe:/a:redhat:enterprise_linux:skopeo-tests, p-cpe:/a:redhat:enterprise_linux:skopeo, p-cpe:/a:redhat:enterprise_linux:trustee-guest-components, p-cpe:/a:redhat:enterprise_linux:trustee-kbs

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 10/8/2026

Reference Information

CVE: CVE-2026-56857