Linux Distros Unpatched Vulnerability : CVE-2026-29079

high Nessus Plugin ID 310823

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.

- Lexbor is a web browser engine library. Prior to 2.7.0, a typeconfusion vulnerability exists in Lexbor's HTML fragment parser. When ns = UNDEF, a comment is created using the unknown element constructor. The comment's data are written into the element's fields via an unsafe cast, corrupting the qualified_name field. That corrupted value is later used as a pointer and dereferenced near the zero page. This vulnerability is fixed in 2.7.0. (CVE-2026-29079)

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: 310823

File Name: unpatched_CVE_2026_29079.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Misc.

Published: 4/29/2026

Updated: 4/29/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

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

CVSS Score Source: CVE-2026-29079

CVSS v4

Risk Factor: High

Base Score: 8.2

Threat Score: 4.6

Threat Vector: CVSS:4.0/E:U

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

CVSS Score Source: CVE-2026-29079

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:lexbor, cpe:/o:canonical:ubuntu_linux:26.04

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: 3/13/2026

Reference Information

CVE: CVE-2026-29079

Detections

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