Linux Distros Unpatched Vulnerability : CVE-2026-89161

high Nessus Plugin ID 344733

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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.

- In PCRE2 before 10.48, pcre2_jit_match mishandles a previously copied subject being passed in as a context. An incorrect free operation can occur. (CVE-2026-89161)

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: High

ID: 344733

File Name: unpatched_CVE_2026_89161.nasl

Version: 1.12

Type: Local

Agent: unix

Family: Misc.

Published: 9/11/2026

Updated: 10/22/2026

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: 58.27

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.4

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

CVSS Score Source: CVE-2026-89161

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.1

Vector: CVSS:3.0/AV:L/AC:L/PR:L/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: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:pcre2, p-cpe:/a:redhat:enterprise_linux:bootc, p-cpe:/a:redhat:enterprise_linux:mariadb-backup, p-cpe:/a:redhat:enterprise_linux:mariadb-common, p-cpe:/a:redhat:enterprise_linux:mariadb-devel, p-cpe:/a:redhat:enterprise_linux:mariadb-embedded-devel, p-cpe:/a:redhat:enterprise_linux:mariadb-embedded, p-cpe:/a:redhat:enterprise_linux:mariadb-errmsg, p-cpe:/a:redhat:enterprise_linux:mariadb-gssapi-server, p-cpe:/a:redhat:enterprise_linux:mariadb-oqgraph-engine, p-cpe:/a:redhat:enterprise_linux:mariadb-pam, p-cpe:/a:redhat:enterprise_linux:mariadb-server-galera, p-cpe:/a:redhat:enterprise_linux:mariadb-server-utils, p-cpe:/a:redhat:enterprise_linux:mariadb-server, p-cpe:/a:redhat:enterprise_linux:mariadb-test, p-cpe:/a:redhat:enterprise_linux:mariadb, p-cpe:/a:redhat:enterprise_linux:mingw32-pcre2-static, p-cpe:/a:redhat:enterprise_linux:mingw32-pcre2, p-cpe:/a:redhat:enterprise_linux:mingw64-pcre2-static, p-cpe:/a:redhat:enterprise_linux:mingw64-pcre2, p-cpe:/a:redhat:enterprise_linux:system-reinstall-bootc

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: 9/11/2026

Reference Information

CVE: CVE-2026-89161

Detections

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