CVE-2026-56002CWE-122

libXfont2 PCF Font Parsing Heap Buffer Overflow

High · published July 8, 2026

CVSS v3.1
8.5
EPSS
0%
Percentile
36.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00428 · 36.0th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-07-08T09:12Z
EPSS history
Timeline
  • 08 JUL 09:12Z
    libXfont2 PCF Font Parsing Heap Buffer Overflow
    cvelistv5