VULNERABILITY INTELLIGENCE
CVE-2023-6816
CVSS score9.8 CRITICAL
EPSS probability2.11%
CISA KEVNot currently listed
Published2024-01-18
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
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.
Weakness classification
- secalert@redhat.com: CWE-787
- nvd@nist.gov: CWE-787