CVE-2026-56002

Published: Jul 8, 2026Modified: Jul 13, 2026

8.8

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 2.8 / Impact: 5.9

Source: NVD

Description

A heap bufferflow in pcfReadFont() due to missing glyph bounds checking in libXfont2 before 2.0.8 allows attackers authenticated as X client to execute code within the X server.

Affected (1)

Products: X: Libxfont

1 product

Libxfont

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
X Libxfont	Before 2.0.8

Related CWEs

CWE-122

Heap-based Buffer Overflow

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

References (2)

https://gitlab.freedesktop.org/xorg/lib/libxfont/-/commit/b4389e0b1d84a690b819bb27b1439968811a3674

Source: meissner@suse.de

Patch

https://www.openwall.com/lists/oss-security/2026/07/08/1

Source: meissner@suse.de

Mailing ListPatchThird Party Advisory

Timeline

No history available yet.