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CVE-2023-6816

CVE-2023-6816 · Xorg-x11-server: heap buffer overflow in devicefocusevent and procxiquerypointer

This page contains facts from public vulnerability sources. Check the original advisory before updating.

This page shows selected source facts. See the linked advisories for the complete description and affected versions.

A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap overflow if a bigger value was used.

CVSS 9.8 · Critical · EPSS 2.1% · Fix available

Published
Updated

Stack: system

Affected products and versions

Original sources

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