CVE-2026-55999
High · 8.5CVSS
8.5
EPSS
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Published
Jul 8, 2026
CISA due date
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The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
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