CVE-2026-93524mediumCWE-126

CVE-2026-93524: medium-severity vulnerability in x.org xwayland

X.Org Server XKB SetMap Key Width/Action Count Desync Out-Of-Bounds Read

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13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.9epss 0.2%
A buffer overread in CheckKeySyms() in X.Org X Server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to leak small amounts of information from X server memory or potentially crash the X server.
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
x.org · xorg-x11-serverx.org · xwayland
Related CVEs — x.org xwayland

In the same product, most dangerous first.

CVE-2026-93523HIGHX.Org Server XInput2 PassiveUngrabDevice Out-of-Bounds WriteEPSS 0.2%CVE-2026-93522HIGHX.Org Server Glamor CopyArea Heap Buffer OverflowEPSS 0.2%CVE-2026-93521HIGHX.Org Server RandR ChangeProviderProperty Heap Buffer OverflowEPSS 0.2%CVE-2026-93520HIGHX.Org Server XKB ChangeKeycodeRange Heap Out-of-Bounds WriteEPSS 0.2%CVE-2026-93519HIGHX.Org Server XFixes Pointer Barrier Event List Buffer OverflowEPSS 0.2%CVE-2026-93518HIGHX.Org Server XKB ResizeKeyType Numeric TruncationEPSS 0.2%