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Vulnerabilities / CVE-2026-34000

critical

CVE-2026-34000

xwayland: xorg: X.Org X server: Information disclosure and denial of service via out-of-bounds read in XKB geometry processing.

Published Modified CWE 125
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Red Hat6.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by AlmaLinux (high), Amazon (high), Oracle (high), Rocky Linux (high), Red Hat (medium).

Description

A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry processing, specifically within the `CheckSetGeom()` and `XkbAddGeomKeyAlias` functions, allows an attacker to read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server, either locally or remotely, can exploit this without user interaction. This could lead to the disclosure of memory contents or cause a denial of service by crashing the server.

Affected packages and fixed versions

SourcePackageFixed in
alma 9tigervnc, tigervnc-icons, tigervnc-license and 4 more1.15.0-7.el9_8.1
alpine 3.23xorg-server, xwayland21.1.22-r0 and 1 more
alpine 3.24xorg-server, xwayland21.1.22-r0 and 1 more
alpine edgexorg-server, xwayland21.1.22-r0 and 1 more
amazon linux 2023tigervnc, tigervnc-debuginfo, tigervnc-debugsource and 26 more1.14.1-3.amzn2023.0.5 and 2 more
chainguardxorg-server21.1.22-r0
debian 11xorg-server2:1.20.11-1+deb11u18
debian 12xorg-server, xwayland2:21.1.7-3+deb12u12
debian 13xorg-server, xwayland2:21.1.16-1.3+deb13u2
debian 14xorg-server, xwayland2:21.1.22-1 and 1 more
echoxorg-server, xwayland2:21.1.7-3+deb12u12
Oracle Linux 7tigervnc, tigervnc-icons, tigervnc-license and 13 more1.8.0-33.0.11.el7_9 and 1 more
Show all 188 entries from 34 sources
SourcePackageFixed in
alma 9tigervnc1.15.0-7.el9_8.1
alma 9tigervnc-icons1.15.0-7.el9_8.1
alma 9tigervnc-license1.15.0-7.el9_8.1
alma 9tigervnc-selinux1.15.0-7.el9_8.1
alma 9tigervnc-server1.15.0-7.el9_8.1
alma 9tigervnc-server-minimal1.15.0-7.el9_8.1
alma 9tigervnc-server-module1.15.0-7.el9_8.1
alpine 3.23xorg-server21.1.22-r0
alpine 3.23xwayland24.1.10-r0
alpine 3.24xorg-server21.1.22-r0
alpine 3.24xwayland24.1.10-r0
alpine edgexorg-server21.1.22-r0
alpine edgexwayland24.1.10-r0
amazon linux 2023tigervnc1.14.1-3.amzn2023.0.5
amazon linux 2023tigervnc-debuginfo1.14.1-3.amzn2023.0.5
amazon linux 2023tigervnc-debugsource1.14.1-3.amzn2023.0.5
amazon linux 2023tigervnc-icons1.14.1-3.amzn2023.0.5
amazon linux 2023tigervnc-license1.14.1-3.amzn2023.0.5
amazon linux 2023tigervnc-selinux1.14.1-3.amzn2023.0.5
amazon linux 2023tigervnc-server1.14.1-3.amzn2023.0.5
amazon linux 2023tigervnc-server-debuginfo1.14.1-3.amzn2023.0.5
amazon linux 2023tigervnc-server-minimal1.14.1-3.amzn2023.0.5
amazon linux 2023tigervnc-server-minimal-debuginfo1.14.1-3.amzn2023.0.5
amazon linux 2023tigervnc-server-module1.14.1-3.amzn2023.0.5
amazon linux 2023tigervnc-server-module-debuginfo1.14.1-3.amzn2023.0.5
amazon linux 2023xorg-x11-server-Xephyr21.1.13-5.amzn2023.0.9
amazon linux 2023xorg-x11-server-Xephyr-debuginfo21.1.13-5.amzn2023.0.9
amazon linux 2023xorg-x11-server-Xnest21.1.13-5.amzn2023.0.9
amazon linux 2023xorg-x11-server-Xnest-debuginfo21.1.13-5.amzn2023.0.9
amazon linux 2023xorg-x11-server-Xorg21.1.13-5.amzn2023.0.9
amazon linux 2023xorg-x11-server-Xorg-debuginfo21.1.13-5.amzn2023.0.9
amazon linux 2023xorg-x11-server-Xvfb21.1.13-5.amzn2023.0.9
amazon linux 2023xorg-x11-server-Xvfb-debuginfo21.1.13-5.amzn2023.0.9
amazon linux 2023xorg-x11-server-Xwayland24.1.3-1.amzn2023.0.4
amazon linux 2023xorg-x11-server-Xwayland-debuginfo24.1.3-1.amzn2023.0.4
amazon linux 2023xorg-x11-server-Xwayland-debugsource24.1.3-1.amzn2023.0.4
amazon linux 2023xorg-x11-server-Xwayland-devel24.1.3-1.amzn2023.0.4
amazon linux 2023xorg-x11-server-common21.1.13-5.amzn2023.0.9
amazon linux 2023xorg-x11-server-debuginfo21.1.13-5.amzn2023.0.9
amazon linux 2023xorg-x11-server-debugsource21.1.13-5.amzn2023.0.9
amazon linux 2023xorg-x11-server-devel21.1.13-5.amzn2023.0.9
amazon linux 2023xorg-x11-server-source21.1.13-5.amzn2023.0.9
chainguardxorg-server21.1.22-r0
debian 11xorg-server2:1.20.11-1+deb11u18
debian 12xorg-server2:21.1.7-3+deb12u12
debian 12xwaylandno fix listed
debian 13xorg-server2:21.1.16-1.3+deb13u2
debian 13xwaylandno fix listed
debian 14xorg-server2:21.1.22-1
debian 14xwayland2:24.1.10-1
echoxorg-server2:21.1.7-3+deb12u12
echoxwaylandno fix listed
Oracle Linux 7tigervnc1.8.0-33.0.11.el7_9
Oracle Linux 7tigervnc-icons1.8.0-33.0.11.el7_9
Oracle Linux 7tigervnc-license1.8.0-33.0.11.el7_9
Oracle Linux 7tigervnc-server1.8.0-33.0.11.el7_9
Oracle Linux 7tigervnc-server-applet1.8.0-33.0.11.el7_9
Oracle Linux 7tigervnc-server-minimal1.8.0-33.0.11.el7_9
Oracle Linux 7tigervnc-server-module1.8.0-33.0.11.el7_9
Oracle Linux 7xorg-x11-server-Xdmx1.20.4-29.0.7.el7_9
Oracle Linux 7xorg-x11-server-Xephyr1.20.4-29.0.7.el7_9
Oracle Linux 7xorg-x11-server-Xnest1.20.4-29.0.7.el7_9
Oracle Linux 7xorg-x11-server-Xorg1.20.4-29.0.7.el7_9
Oracle Linux 7xorg-x11-server-Xvfb1.20.4-29.0.7.el7_9
Oracle Linux 7xorg-x11-server-Xwayland1.20.4-29.0.7.el7_9
Oracle Linux 7xorg-x11-server-common1.20.4-29.0.7.el7_9
Oracle Linux 7xorg-x11-server-devel1.20.4-29.0.7.el7_9
Oracle Linux 7xorg-x11-server-source1.20.4-29.0.7.el7_9
Oracle Linux 9tigervnc1.15.0-7.el9_8.1
Oracle Linux 9tigervnc-icons1.15.0-7.el9_8.1
Oracle Linux 9tigervnc-license1.15.0-7.el9_8.1
Oracle Linux 9tigervnc-selinux1.15.0-7.el9_8.1
Oracle Linux 9tigervnc-server1.15.0-7.el9_8.1
Oracle Linux 9tigervnc-server-minimal1.15.0-7.el9_8.1
Oracle Linux 9tigervnc-server-module1.15.0-7.el9_8.1
rapidfort alma 8xorg-x11-server-develno fix listed
rapidfort alma 8xorg-x11-server-sourceno fix listed
rapidfort alma 9tigervnc1.15.0-7.el9_8.1
rapidfort alma 9tigervnc-icons1.15.0-7.el9_8.1
rapidfort alma 9tigervnc-license1.15.0-7.el9_8.1
rapidfort alma 9tigervnc-selinux1.15.0-7.el9_8.1
rapidfort alma 9tigervnc-server1.15.0-7.el9_8.1
rapidfort alma 9tigervnc-server-minimal1.15.0-7.el9_8.1
rapidfort alma 9tigervnc-server-module1.15.0-7.el9_8.1
rapidfort alma 9xorg-x11-server-Xwayland-develno fix listed
rapidfort alma 9xorg-x11-server-develno fix listed
rapidfort alma 9xorg-x11-server-sourceno fix listed
rapidfort alpine 3.20xorg-server21.1.22-r0
rapidfort alpine 3.20xwayland24.1.10-r0
rapidfort alpine 3.21xorg-server21.1.22-r0
rapidfort alpine 3.21xwayland24.1.10-r0
rapidfort alpine 3.22xorg-server21.1.22-r0
rapidfort alpine 3.22xwayland24.1.10-r0
rapidfort alpine 3.23xorg-server21.1.22-r0
rapidfort alpine 3.23xwayland24.1.10-r0
rapidfort alpine 3.24xorg-server21.1.22-r0
rapidfort alpine 3.24xwayland24.1.10-r0
rapidfort amazon linux 2023tigervnc1.14.1-3.amzn2023.0.5
rapidfort amazon linux 2023tigervnc-icons1.14.1-3.amzn2023.0.5
rapidfort amazon linux 2023tigervnc-license1.14.1-3.amzn2023.0.5
rapidfort amazon linux 2023tigervnc-selinux1.14.1-3.amzn2023.0.5
rapidfort amazon linux 2023tigervnc-server1.14.1-3.amzn2023.0.5
rapidfort amazon linux 2023tigervnc-server-minimal1.14.1-3.amzn2023.0.5
rapidfort amazon linux 2023tigervnc-server-module1.14.1-3.amzn2023.0.5
rapidfort amazon linux 2023xorg-x11-server-Xephyr21.1.13-5.amzn2023.0.9
rapidfort amazon linux 2023xorg-x11-server-Xnest21.1.13-5.amzn2023.0.9
rapidfort amazon linux 2023xorg-x11-server-Xorg21.1.13-5.amzn2023.0.9
rapidfort amazon linux 2023xorg-x11-server-Xvfb21.1.13-5.amzn2023.0.9
rapidfort amazon linux 2023xorg-x11-server-Xwayland24.1.3-1.amzn2023.0.4
rapidfort amazon linux 2023xorg-x11-server-Xwayland-devel24.1.3-1.amzn2023.0.4
rapidfort amazon linux 2023xorg-x11-server-common21.1.13-5.amzn2023.0.9
rapidfort amazon linux 2023xorg-x11-server-devel21.1.13-5.amzn2023.0.9
rapidfort amazon linux 2023xorg-x11-server-source21.1.13-5.amzn2023.0.9
rapidfort debian 12xorg-server2:21.1.16-1.3+deb13u2, 2:21.1.22-1
rapidfort debian 12xwayland2:24.1.10-1
rapidfort debian 13xorg-server2:21.1.16-1.3+deb13u2, 2:21.1.22-1
rapidfort debian 13xwayland2:24.1.10-1
rapidfort fedora 43tigervnc1.16.2-2.fc43
rapidfort fedora 43tigervnc-icons1.16.2-2.fc43
rapidfort fedora 43tigervnc-license1.16.2-2.fc43
rapidfort fedora 43tigervnc-selinux1.16.2-2.fc43
rapidfort fedora 43tigervnc-server1.16.2-2.fc43
rapidfort fedora 43tigervnc-server-minimal1.16.2-2.fc43
rapidfort fedora 43tigervnc-server-module1.16.2-2.fc43
rapidfort fedora 43xorg-x11-server21.1.22-1.fc43
rapidfort fedora 43xorg-x11-server-Xephyr21.1.22-1.fc43
rapidfort fedora 43xorg-x11-server-Xnest21.1.22-1.fc43
rapidfort fedora 43xorg-x11-server-Xorg21.1.22-1.fc43
rapidfort fedora 43xorg-x11-server-Xvfb21.1.22-1.fc43
rapidfort fedora 43xorg-x11-server-Xwayland24.1.10-1.fc43
rapidfort fedora 43xorg-x11-server-Xwayland-devel24.1.10-1.fc43
rapidfort fedora 43xorg-x11-server-common21.1.22-1.fc43
rapidfort fedora 43xorg-x11-server-devel21.1.22-1.fc43
rapidfort fedora 43xorg-x11-server-source21.1.22-1.fc43
rapidfort Oracle Linux 10xorg-x11-server-Xwayland0:24.1.5-6.el10_0
rapidfort Oracle Linux 10xorg-x11-server-Xwayland-devel0:24.1.5-6.el10_0
rapidfort Oracle Linux 9tigervnc0:1.15.0-7.el9_8.1
rapidfort Oracle Linux 9tigervnc-icons0:1.15.0-7.el9_8.1
rapidfort Oracle Linux 9tigervnc-license0:1.15.0-7.el9_8.1
rapidfort Oracle Linux 9tigervnc-selinux0:1.15.0-7.el9_8.1
rapidfort Oracle Linux 9tigervnc-server0:1.15.0-7.el9_8.1
rapidfort Oracle Linux 9tigervnc-server-minimal0:1.15.0-7.el9_8.1
rapidfort Oracle Linux 9tigervnc-server-module0:1.15.0-7.el9_8.1
rapidfort Oracle Linux 9xorg-x11-server-Xdmx0:1.20.11-13.el9_0
rapidfort Oracle Linux 9xorg-x11-server-Xephyr0:1.20.11-13.el9_0
rapidfort Oracle Linux 9xorg-x11-server-Xnest0:1.20.11-13.el9_0
rapidfort Oracle Linux 9xorg-x11-server-Xorg0:1.20.11-13.el9_0
rapidfort Oracle Linux 9xorg-x11-server-Xvfb0:1.20.11-13.el9_0
rapidfort Oracle Linux 9xorg-x11-server-Xwayland0:21.1.3-5.el9_0
rapidfort Oracle Linux 9xorg-x11-server-Xwayland-develno fix listed
rapidfort Oracle Linux 9xorg-x11-server-common0:1.20.11-13.el9_0
rapidfort Oracle Linux 9xorg-x11-server-develno fix listed
rapidfort Oracle Linux 9xorg-x11-server-sourceno fix listed
rapidfort Red Hat 9xorg-x11-server-Xwayland-develno fix listed
rapidfort Red Hat 9xorg-x11-server-develno fix listed
rapidfort Red Hat 9xorg-x11-server-sourceno fix listed
rapidfort rocky 8xorg-x11-server-develno fix listed
rapidfort rocky 9xorg-x11-server-Xwayland-develno fix listed
rapidfort rocky 9xorg-x11-server-develno fix listed
Red Hattigervncno fix listed
Red Hattigervnc-iconsno fix listed
Red Hattigervnc-licenseno fix listed
Red Hattigervnc-selinuxno fix listed
Red Hattigervnc-serverno fix listed
Red Hattigervnc-server-appletno fix listed
Red Hattigervnc-server-minimalno fix listed
Red Hattigervnc-server-moduleno fix listed
Red Hatxorg-x11-serverno fix listed
Red Hatxorg-x11-server-Xdmxno fix listed
Red Hatxorg-x11-server-Xephyrno fix listed
Red Hatxorg-x11-server-Xnestno fix listed
Red Hatxorg-x11-server-Xorgno fix listed
Red Hatxorg-x11-server-Xvfbno fix listed
Red Hatxorg-x11-server-Xwaylandno fix listed
Red Hatxorg-x11-server-Xwayland-develno fix listed
Red Hatxorg-x11-server-commonno fix listed
Red Hatxorg-x11-server-develno fix listed
Red Hatxorg-x11-server-sourceno fix listed
rocky 9tigervnc1.15.0-7.el9_8.1
rocky 9tigervnc-icons1.15.0-7.el9_8.1
rocky 9tigervnc-license1.15.0-7.el9_8.1
rocky 9tigervnc-selinux1.15.0-7.el9_8.1
rocky 9tigervnc-server1.15.0-7.el9_8.1
rocky 9tigervnc-server-minimal1.15.0-7.el9_8.1
rocky 9tigervnc-server-module1.15.0-7.el9_8.1
root.io debian 11rootio-xorg-serverno fix listed
root.io debian 12rootio-xorg-server2:21.1.7-3+deb12u12
wolfixorg-server21.1.22-r0

References

All 48 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.