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Linux Distros Unpatched Vulnerability : CVE-2026-34085

medium Nessus Plugin ID 303838

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.

 - fontconfig before 2.17.1 has an off-by-one error in allocation during sfnt capability handling, leading to a one-byte out-of-bounds write, and potentially a crash or code execution. This is in FcFontCapabilities in fcfreetype.c. (CVE-2026-34085)

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-2026-34085

https://security-tracker.debian.org/tracker/CVE-2026-34085

Plugin Details

Severity: Medium

ID: 303838

File Name: unpatched_CVE_2026_34085.nasl

Version: 1.1

Type: local

Agent: unix

Family: Misc.

Published: 3/26/2026

Updated: 3/26/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.4

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-2026-34085

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.4

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:fontconfig, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:redhat:enterprise_linux:mingw-fontconfig, p-cpe:/a:redhat:enterprise_linux:mingw32-fontconfig, p-cpe:/a:centos:centos:fontconfig-devel, p-cpe:/a:centos:centos:fontconfig-devel-doc, p-cpe:/a:centos:centos:mingw-fontconfig, cpe:/o:debian:debian_linux:12.0, cpe:/o:redhat:enterprise_linux:9, cpe:/o:centos:centos:8, p-cpe:/a:redhat:enterprise_linux:fontconfig, p-cpe:/a:centos:centos:fontconfig, p-cpe:/a:centos:centos:mingw64-fontconfig, 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:mingw64-fontconfig, p-cpe:/a:redhat:enterprise_linux:fontconfig-devel, cpe:/o:centos:centos:7, p-cpe:/a:centos:centos:mingw32-fontconfig, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:fontconfig-devel-doc

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: 3/25/2026

Reference Information

CVE: CVE-2026-34085