HIGH 7.1 Microsoft
CVE-2026-34003
Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory access
Microsoft Security Update 2026-Apr: Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory access
Affected Products
- 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
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34003
- https://nvd.nist.gov/vuln/detail/CVE-2026-34003
This high severity vulnerability with a CVSS score of 7.1 was published on 2026-04-14 via Microsoft. Affected: 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.
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