[CVE-2026-55999] Local attackers with a X connection able to provide PCX fonts to the X server xorg-server before 21…

Descripción técnica

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.

Puntuación CVSS

Score: 8.5/10 — Severidad: HIGH — Estado NIST: Analyzed

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Productos afectados

X server, Xwayland — X.org

Debilidades (CWE)

CWE-122

Fuente oficial

Publicado en NIST NVD.