CVE-2026-93515mediumCWE-416

CVE-2026-93515: medium-severity vulnerability in x.org xwayland

.Org Server Present Extension Use-After-Free

Published

Follow this CVE+ Monitor xorg-x11-server+ Monitor xwayland

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

13Vexday Risk Score

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

ssvc Trackcvss 6.8epss 0.2%
A use-after-free in present_clear_window_notifies() in the X.org X Server before 21.1.25 and X Wayland before 24.1.14 could be used by malicious X clients to crash or potentially execute code in the X server context.
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
x.org · xwaylandX.org · xorg-x11-server
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-2026-93518HIGHX.Org Server XKB ResizeKeyType Numeric TruncationEPSS 0.2%CVE-2026-93517HIGHX.Org Server GLX RenderLarge Heap Buffer OverflowEPSS 0.2%