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Vulnerabilities CVE-2026-34003

CVE-2026-34003

High
Open
TLP:CLEAR

Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory access

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Description

A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This could result in the disclosure of sensitive information or cause the server to crash, leading to a Denial of Service (DoS). In certain configurations, higher impact outcomes may be possible.

Details

CVSS Score
7.8
EPSS Score
0.25%

16.5th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Confidence
90%
Published
Apr 23, 2026
Last Modified
May 28, 2026
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