Back to overview

CVE-2026-55999

HIGH
8.5
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-55999
State
PUBLISHED
Assigner
suse
Reserved
2026-06-18 09:26 UTC
Published
2026-07-08 08:07 UTC
Last updated
2026-07-08 08:12 UTC
Primary CWE
CWE-122
CWE-122 Heap-based buffer overflow
Vendor / Product
X.Org / xorg-server
Sources
cve.org  ·  NVD

Severity & Metrics

8.5 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products (2)
VendorProductPlatformVersions
X.Org xorg-server — 0 < 21.1.24
X.Org xwayland — 0 < 24.1.13
Weakness (CWE)
CWESourceDescription
CWE-122 cna CWE-122 Heap-based buffer overflow
CVSS scores (1)
ScoreSeverityVersionSourceVector
8.5 HIGH 3.1 cna CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
References (2)
Back to overview