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CVE-2026-55999

HIGH CVSS: 8.5 Published: 2026-07-08 Modified: 2026-07-09

Description

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.

Affected Platforms

X.Org X ServerX.Org Xwayland

Weakness Type

CWE-122

References