CVE-2026-50258: Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in xkb key types due to unchecked shift levels

Overview

Severity

High (CVSS 7.8)

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Status

Not Exploited

Patch Tuesday

2026-Jun

Released

2026-06-09

Last Updated

2026-06-11

EPSS Score

0.16% (percentile: 5.6%)

Affected Products (1)

Other

• 21316-17084

Revision History

• 2026-06-09: Information published.
• 2026-06-11: Information published.