CVE-2026-34002
Xorg: xwayland: x.org x server: information disclosure or denial of service via out-of-bounds read in xkb modifier map handling
Description
A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB (X Keyboard Extension) modifier map handling. An attacker with access to the X11 server can exploit this by sending a malformed request, which causes the server to read beyond its intended memory boundaries. This can lead to the exposure of sensitive information or cause the server to crash, resulting in a denial of service.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:LAttack VectorLocal
AC:LAttack ComplexityLow
PR:LPrivileges RequiredLow
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:HConfidentialityHigh
I:NIntegrityNone
A:LAvailabilityLow
Weaknesses
Affected Products
Red Hat
commercial·USaka redhat
АО «ИВК»
commercial·RUaka ivk
X.Org Foundation
oss-project·USaka libx11, xlib, xorg-server
Сообщество свободного программного обеспечения
oss-projectaka fsf
x.org
oss-project·US
and 12 more affected products View all →
Exploitability
Official Patch Available
Workaround Available
References
https://lists.x.org/archives/xorg-announce/2026-April/003679.html
lists.x.org
https://lists.x.org/archives/xorg-announce/2026-April/003678.html
lists.x.org
https://opennet.ru/opennews/art.shtml?num=65210
opennet.ru
and 27 more references View all →
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