Detections
Analytics

Alpine: multiple xorg-server packages: security update to 21.1.24-r0

critical Tenable Cloud Security Plugin ID 444515

Description

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

 - Local attackers with a X connection able to provide PCX fonts to the X server xorg-server before 21.2.24
 and xwayland before 24.1.13 could cause a heap buffer overflow via SetFont due to missing glyph boundary
 checks. (CVE-2026-55999)

 - Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24
 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into
 potentially reallocated memory. (CVE-2026-56000)

Solution

Update the xorg-server library and its related packages to version 21.1.24-r0 or later.

See Also

https://security.alpinelinux.org/vuln/CVE-2026-55999

https://security.alpinelinux.org/vuln/CVE-2026-56000

Plugin Details

Severity: Critical

ID: 444515

Version: Revision 1.1

Type: Local

Published: 7/8/2026

Updated: 7/8/2026

Supported Sensors: Agentless Assessment

Risk Information

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-55999

CVSS v3

Risk Factor: High

Base Score: 8.5

Temporal Score: 7.4

Vector: CVSS:3.0/AV:N/AC:H/PR:L/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

Threat Score: 6.1

Threat Vector: CVSS:4.0/E:U

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

CVSS Score Source: CVE-2026-56000

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 7/8/2026

Reference Information

CVE: CVE-2026-55999, CVE-2026-56000