Linux Distros Unpatched Vulnerability : CVE-2026-19079

medium Nessus Plugin ID 333304

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.

- A TOCTOU (Time-of-Check-Time-of-Use) race condition vulnerability was found in the fixfiles script in policycoreutils. When running fixfiles relabel or fixfiles restore, the script used find and chcon commands to locate and relabel unlabeled files under /tmp and other directories. A local attacker could exploit a race window between the file discovery and the label change operation by swapping directory components with symlinks, causing chcon to follow the symlink and modify SELinux labels on arbitrary system files. This could undermine SELinux mandatory access control protections on critical files such as /etc/shadow. (CVE-2026-19079)

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

Solution

There is no known solution at this time.

Plugin Details

Severity: Medium

ID: 333304

File Name: unpatched_CVE_2026_19079.nasl

Version: 1.3

Type: Local

Agent: unix

Family: Misc.

Published: 8/7/2026

Updated: 8/7/2026

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

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.9

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

CVSS Score Source: CVE-2026-19079

CVSS v3

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 4.1

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

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:centos:centos:7, cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:11.0, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:debian:debian_linux:14.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:policycoreutils, p-cpe:/a:centos:centos:policycoreutils-dbus, p-cpe:/a:centos:centos:policycoreutils-devel, p-cpe:/a:centos:centos:policycoreutils-gui, p-cpe:/a:centos:centos:policycoreutils-newrole, p-cpe:/a:centos:centos:policycoreutils-python-utils, p-cpe:/a:centos:centos:policycoreutils-python, p-cpe:/a:centos:centos:policycoreutils-restorecond, p-cpe:/a:centos:centos:policycoreutils-sandbox, p-cpe:/a:centos:centos:policycoreutils, p-cpe:/a:centos:centos:python3-policycoreutils, p-cpe:/a:debian:debian_linux:policycoreutils, p-cpe:/a:redhat:enterprise_linux:policycoreutils-dbus, p-cpe:/a:redhat:enterprise_linux:policycoreutils-devel, p-cpe:/a:redhat:enterprise_linux:policycoreutils-gui, p-cpe:/a:redhat:enterprise_linux:policycoreutils-newrole, p-cpe:/a:redhat:enterprise_linux:policycoreutils-python-utils, p-cpe:/a:redhat:enterprise_linux:policycoreutils-python, p-cpe:/a:redhat:enterprise_linux:policycoreutils-restorecond, p-cpe:/a:redhat:enterprise_linux:policycoreutils-sandbox, p-cpe:/a:redhat:enterprise_linux:policycoreutils, p-cpe:/a:redhat:enterprise_linux:python3-policycoreutils

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 8/7/2026

Reference Information

CVE: CVE-2026-19079

Detections

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