High 8.5Published Oct 28, 2026

CVE-2026-93517X.Org Server GLX RenderLarge Heap Buffer Overflow

Updated under an hour ago (Oct 29, 2026, 3:10 PM ET)

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It affects x.orgg xorg-x11-server and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Start free and add your stackFree account, 3 products Every CVE for x.orgg xorg-x11-server Exploited in the last 30 days

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: 8.5 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-122
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: suse
NVD analysis: Awaiting Analysis
Record last updated: Oct 28, 2026
First seen by InfoSec Signals: Oct 28, 2026

Affected products

Affected products

x.orgg xorg-x11-server x.orgg:xorg_x11_server (from the name)	before 21.1.25	CNA record
x.org xwayland x.org:xwayland (from the name)	before 24.1.14	CNA record

References

References

https://gitlab.freedesktop.org/xorg/xserver/-/commit/2abe4632d793314d3d5f28c19583fb76019f5ce4	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.