RockyLinux 9 : libXfont2 (RLSA-2026:55447)

critical Nessus Plugin ID 335982

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Synopsis

The remote RockyLinux host is missing one or more security updates.

Description

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:55447 advisory.

* libxfont2: Font Server Client encoding[] Out-Of-Bounds Read/Write (CVE-2026-59679)

* libxfonts2: libXfont2: Privilege Escalation via Heap Buffer Overflow in Font Server Client (CVE-2026-44950)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 335982

File Name: rocky_linux_RLSA-2026-55447.nasl

Version: 1.2

Type: Local

Family: Rocky Linux Local Security Checks

Published: 8/17/2026

Updated: 9/11/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.41

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 5.6

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

CVSS Score Source: CVE-2026-59679

CVSS v3

Risk Factor: Critical

Base Score: 9

Temporal Score: 7.8

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.5

Threat Score: 8.4

Threat Vector: CVSS:4.0/E:U

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

CVSS Score Source: CVE-2026-44950

Vulnerability Information

CPE: cpe:/o:rocky:linux:9, p-cpe:/a:rocky:linux:libxfont2-debuginfo, p-cpe:/a:rocky:linux:libxfont2-debugsource, p-cpe:/a:rocky:linux:libxfont2-devel, p-cpe:/a:rocky:linux:libxfont2

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RockyLinux/release, Host/RockyLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 8/17/2026

Vulnerability Publication Date: 8/5/2026

Reference Information

CVE: CVE-2026-44950, CVE-2026-59679

Detections

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