CVE-2026-56003CWE-122
libXfont2 computeProps Property Buffer Heap Buffer Overflow
High · published July 8, 2026
What it is
A heap buffer overflow due to missing size checking in the property buffer when parsing PCF files in libXfont2 ComputeScaledProperties() before libXfont2 before 2.0.8 could be used by attackers using authenticated X clients 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
- 0.00400 · 33.1th percentile
- Weakness
- CWE-122 · Heap-based Buffer Overflow
- Published
- 2026-07-08T09:25Z
EPSS history
Timeline