CVE-2026-56003

—

CVSS 3.1

8.8 high

EPSS

<1%p33

Published

Jul 8, 2026 (Jul 8, 2026)

Modified

Jul 9, 2026

Description

A heap buffer overflow due to missing size checking in the property buffer when parsing PCF files in libXfont2 ComputeScaledProperties() before libXfont2 before 2.0.8 could be used by attackers using authenticated X clients to execute code within the X server.

Vendors: x
Products: libxfont
Weakness: CWE-122
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.4%)

In the news0 stories

No ingested article mentions this CVE yet.