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.
Fix
Vendor advisories in the News 1
- ZDI-26-768: X.Org Server XInput ProcXIPassiveUngrabDevice Heap-based Buffer Overflow Privilege Escalation Vulnerability Zero Day Initiative: published advisories · 2026-10-15
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 3
- StatusReceived → PublishedNVD modified 2026-10-28 16:16
- StatusPublished → ReceivedNVD modified 2026-10-28 17:18
- First seenCVSS 7.8 · x.orgNVD modified 2026-10-28 16:16
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.