CVE-2026-34003
HIGHXorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory access
Title source: cnaDescription
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.
References (37)
Core 37
Core References
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:20562
https://access.redhat.com/errata/RHSA-2026:20562
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:20563
https://access.redhat.com/errata/RHSA-2026:20563
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:20575
https://access.redhat.com/errata/RHSA-2026:20575
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:20576
https://access.redhat.com/errata/RHSA-2026:20576
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:20561
https://access.redhat.com/errata/RHSA-2026:20561
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:20590
https://access.redhat.com/errata/RHSA-2026:20590
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:21699
https://access.redhat.com/errata/RHSA-2026:21699
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:21712
https://access.redhat.com/errata/RHSA-2026:21712
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:21715
https://access.redhat.com/errata/RHSA-2026:21715
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:21716
https://access.redhat.com/errata/RHSA-2026:21716
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:20557
https://access.redhat.com/errata/RHSA-2026:20557
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:20558
https://access.redhat.com/errata/RHSA-2026:20558
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:20560
https://access.redhat.com/errata/RHSA-2026:20560
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:21718
https://access.redhat.com/errata/RHSA-2026:21718
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:21741
https://access.redhat.com/errata/RHSA-2026:21741
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:21742
https://access.redhat.com/errata/RHSA-2026:21742
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:22424
https://access.redhat.com/errata/RHSA-2026:22424
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:22456
https://access.redhat.com/errata/RHSA-2026:22456
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:23254
https://access.redhat.com/errata/RHSA-2026:23254
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:23255
https://access.redhat.com/errata/RHSA-2026:23255
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:23496
https://access.redhat.com/errata/RHSA-2026:23496
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:24341
https://access.redhat.com/errata/RHSA-2026:24341
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:11369
https://access.redhat.com/errata/RHSA-2026:11369
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:11388
https://access.redhat.com/errata/RHSA-2026:11388
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:11656
https://access.redhat.com/errata/RHSA-2026:11656
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:11692
https://access.redhat.com/errata/RHSA-2026:11692
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:13414
https://access.redhat.com/errata/RHSA-2026:13414
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:19125
https://access.redhat.com/errata/RHSA-2026:19125
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:19342
https://access.redhat.com/errata/RHSA-2026:19342
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:19343
https://access.redhat.com/errata/RHSA-2026:19343
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:19344
https://access.redhat.com/errata/RHSA-2026:19344
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-34003
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2451113
https://bugzilla.redhat.com/show_bug.cgi?id=2451113
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:10739
https://access.redhat.com/errata/RHSA-2026:10739
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:11352
https://access.redhat.com/errata/RHSA-2026:11352
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:20547
https://access.redhat.com/errata/RHSA-2026:20547
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:20555
https://access.redhat.com/errata/RHSA-2026:20555
Scores
CVSS v3
7.8
EPSS
0.0019
EPSS Percentile
9.2%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-125
Status
published
Products (50)
Red Hat/Red Hat Enterprise Linux 10
Red Hat/Red Hat Enterprise Linux 10
0:24.1.5-6.el10_1
Red Hat/Red Hat Enterprise Linux 10
0:24.1.9-4.el10_2
Red Hat/Red Hat Enterprise Linux 10.0 Extended Update Support
0:24.1.5-6.el10_0
Red Hat/Red Hat Enterprise Linux 6
Red Hat/Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION
0:1.1.0-25.el6_10.16
Red Hat/Red Hat Enterprise Linux 7
Red Hat/Red Hat Enterprise Linux 7 Extended Lifecycle Support
0:1.20.4-34.el7_9
Red Hat/Red Hat Enterprise Linux 7 Extended Lifecycle Support
0:1.8.0-36.el7_9.4
Red Hat/Red Hat Enterprise Linux 8
... and 40 more
Published
Apr 23, 2026
Tracked Since
Apr 23, 2026