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.

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Vendors Products
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Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 08 Jul 2026 12:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 08 Jul 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared X.org
X.org xorg-server
X.org xwayland
Vendors & Products X.org
X.org xorg-server
X.org xwayland

Wed, 08 Jul 2026 08:30:00 +0000

Type Values Removed Values Added
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.
Title xorg-server / xwayland glamor font atlas Heap Buffer Overflow
Weaknesses CWE-122
References
Metrics cvssV3_1

{'score': 8.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: suse

Published:

Updated: 2026-07-08T12:10:11.301Z

Reserved: 2026-06-18T09:26:55.988Z

Link: CVE-2026-55999

cve-icon Vulnrichment

Updated: 2026-07-08T12:10:08.315Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-08T09:30:04Z

Weaknesses