CVE-2026-56001

Published: Jul 8, 2026Modified: Jul 9, 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 buffer overflow in BitmapScaleBitmaps in libXfont2 before 2.0.8 due to an overflowing 32bit size could be used by attackers able to access the X Server to execute code within the X server cont

Affected (1)

Products: X: Libxfont

1 product

Libxfont

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
X Libxfont	From 2.0.0 to 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/be0b08e2d354138d3222b4490e2a77c6ee42f778

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.