CVE-2026-93517highCWE-122

CVE-2026-93517: high-severity vulnerability in x.org xwayland

X.Org Server GLX RenderLarge Heap Buffer Overflow

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21Vexday Risk Score

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

ssvc Trackcvss 8.5epss 0.2%
A heap buffer overflow in handling GLX RenderLarge request where dataBytes exceeds cmdlen in X.org X server before 21.1.25 and XWayland before 24.1.14 that could be be triggered by an authenticated X client could cause crashes or code execution in X server context.
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
x.org · xwaylandx.orgg · 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-2026-93515MEDIUM.Org Server Present Extension Use-After-FreeEPSS 0.2%