HIGH 7.8 Microsoft
CVE-2026-34001
Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruption
Microsoft Security Update 2026-Apr: Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruption
Affected Products
- cbl2 xorg-x11-server 1.20.10-16 on CBL-Mariner 2.0
- cbl2 xorg-x11-server 1.20.10-16 on CBL Mariner 2.0
- azl3 xorg-x11-server-Xwayland 24.1.6-3 on Azure Linux 3.0
- azl3 xorg-x11-server-Xwayland 24.1.6-4 on Azure Linux 3.0
- cbl2 xorg-x11-server 1.20.10-16
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34001
- https://nvd.nist.gov/vuln/detail/CVE-2026-34001
This high severity vulnerability with a CVSS score of 7.8 was published on 2026-04-14 via Microsoft. Affected: cbl2 xorg-x11-server 1.20.10-16 on CBL-Mariner 2.0, cbl2 xorg-x11-server 1.20.10-16 on CBL Mariner 2.0, azl3 xorg-x11-server-Xwayland 24.1.6-3 on Azure Linux 3.0 and 2 more.
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