CVE-2026-56003 (GCVE-0-2026-56003)
Vulnerability from cvelistv5 – Published: 2026-07-08 09:25 – Updated: 2026-07-08 09:25
VLAI
Title
libXfont2 computeProps Property Buffer Heap Buffer Overflow
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.
Severity
8.5 (High)
CWE
- CWE-122 - Heap-based buffer overflow
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.openwall.com/lists/oss-security/2026/… | vendor-advisory |
| https://gitlab.freedesktop.org/xorg/lib/libxfont/… | patch |
Date Public
2026-07-08 09:22
Credits
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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