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CVE-2026-55999

—
CVSS 3.1
7.8 high
EPSS
<1%p19
Published
()
Modified
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.

Vendors
x.org
Products
x server, xwayland
Weakness
CWE-122
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD CVE.org GitHub PoCs EPSS (0.3%)

In the news

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