CVE-2026-55999
HIGH
NVD
CVSS Score
8.5
Severity
HIGH
Published
Jul 08, 2026
Vendor
unknown
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.