What is CVE-2026-50261?

CVE-2026-50261 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangecounter()

Which CVE IDs does CVE-2026-50261 cover?

CVE-2026-50261 covers the following CVE IDs: CVE-2026-50261. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-50261?

CVE-2026-50261 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

CVE-2026-50261HighCVSS 7.8

Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangecounter()

Vendor

Microsoft Security Response Center (MSRC)

Published

June 9, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-50261 →