HIGH 7.8 Microsoft
CVE-2026-50261
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangecounter()
Microsoft Security Update 2026-Jun: Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangecounter()
Affected Products
- azl3 xorg-x11-server-Xwayland 24.1.6-4 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50261
- https://nvd.nist.gov/vuln/detail/CVE-2026-50261
This high severity vulnerability with a CVSS score of 7.8 was published on 2026-06-09 via Microsoft. Affected: azl3 xorg-x11-server-Xwayland 24.1.6-4 on Azure Linux 3.0.
vulnfeed aggregates 9214 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.