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X.Org X11 Server (libXfont2): Mehrere Schwachstellen ermöglichen Ausführen von beliebigem Programmcode mit Administratorrechten
view advisory published 2026-07-15
Ein lokaler Angreifer kann mehrere Schwachstellen in X.Org X11 ausnutzen, um erweiterte Berechtigungen zu erlangen und beliebigen Code mit Root-Rechten auszuführen.
01
describes (3)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-56003US | high8.8 | — | ||
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… | ||||
| CVE-2026-56002US | high8.8 | — | ||
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. | ||||
| CVE-2026-56001US | high8.8 | — | ||
A heap buffer overflow in BitmapScaleBitmaps in libXfont2 before 2.0.8 due to an overflowing 32bit size could be used by attackers able to access the X Server to execute code withi… | ||||
02
references
External citations — patches, advisories, analysis.
- Red Hat Security Advisory RHSA-2026:47079 vom 2026-07-28external
- Red Hat Security Advisory RHSA-2026:47084 vom 2026-08-03external
- Red Hat Security Advisory RHSA-2026:47103 vom 2026-07-29external
- Red Hat Security Advisory RHSA-2026:51058 vom 2026-08-06external
- Red Hat Security Advisory RHSA-2026:51059 vom 2026-08-06external
- Red Hat Security Advisory RHSA-2026:51060 vom 2026-08-06external
- Red Hat Security Advisory RHSA-2026:51061 vom 2026-08-06external
- Red Hat Security Advisory RHSA-2026:51062 vom 2026-08-06external
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