CVE-2026-56003
8.5
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| X.Org | libXfont2 | 0 < 2.0.8 | affected |
Weaknesses
- CWE-122: CWE-122 Heap-based buffer overflow
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
- https://www.openwall.com/lists/oss-security/2026/07/08/1
- https://gitlab.freedesktop.org/xorg/lib/libxfont/-/commit/dff957a5158da038a282a59a31fe736702732939
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