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Linux Distros Unpatched Vulnerability : CVE-2026-0992

high Nessus Plugin ID 286281

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 flaw was found in the libxml2 library. This uncontrolled resource consumption vulnerability occurs when processing XML catalogs that contain repeated <nextCatalog> elements pointing to the same downstream catalog. A remote attacker can exploit this by supplying crafted catalogs, causing the parser to redundantly traverse catalog chains. This leads to excessive CPU consumption and degrades application availability, resulting in a denial-of-service condition. (CVE-2026-0992)

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-2026-0992

https://security-tracker.debian.org/tracker/CVE-2026-0992

Plugin Details

Severity: High

ID: 286281

File Name: unpatched_CVE_2026_0992.nasl

Version: 1.2

Type: local

Agent: unix

Family: Misc.

Published: 1/15/2026

Updated: 1/16/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.9

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.3

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

CVSS Score Source: CVE-2026-0992

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.9

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:redhat:enterprise_linux:python3-libxml2, cpe:/o:redhat:enterprise_linux:6, cpe:/o:debian:debian_linux:12.0, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:libxml2-devel, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:python3-libxml2, p-cpe:/a:debian:debian_linux:libxml2, p-cpe:/a:centos:centos:libxml2-static, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:10, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:redhat:enterprise_linux:libxml2-static, p-cpe:/a:redhat:enterprise_linux:libxml2-python, cpe:/o:centos:centos:7, p-cpe:/a:centos:centos:libxml2, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:libxml2-devel, p-cpe:/a:centos:centos:libxml2-python, p-cpe:/a:redhat:enterprise_linux:libxml2, cpe:/o:debian:debian_linux:14.0

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: 1/15/2026

Reference Information

CVE: CVE-2026-0992