CVSS 7.8 (high) · published 2026-10-28
A heap buffer overflow caused by a XIPassiveUngrabDevice request with an out-of-range modifier value in X.Org X Server before 21.1.15 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in X server context.
Weakness: CWE-122
Source: NVD CVE-2026-93523
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