CVE record · 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

CVSS 6.1 MediumEPSS 0.0049 · 42nd percentile

Published by the CVE Program (CNA: redhat) at 5 May 2026, 14:41 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:24.1.5-6.el10_0 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.1.0-25.el6_10.16 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.4-34.el7_9 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.8.0-36.el7_9.4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.10-4.el8_4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.11.0-8.el8_4.15 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.10-4.el8_4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.11.0-8.el8_4.15 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:21.1.3-2.el8_6.6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-7.el8_6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.12.0-6.el8_6.17 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.12.0-6.el8_6.17 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Telecommunications Update Service Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:21.1.3-2.el8_6.6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Telecommunications Update Service Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-7.el8_6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:21.1.3-2.el8_6.6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-7.el8_6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:21.1.3-13.el8_8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-18.el8_8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.12.0-15.el8_8.17 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:21.1.3-13.el8_8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-18.el8_8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.12.0-15.el8_8.17 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:21.1.3-5.el9_0 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-13.el9_0 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.11.0-22.el9_0.17 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:21.1.3-10.el9_2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-20.el9_2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.12.0-14.el9_2.14 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.4 Extended Update Support Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-28.el9_4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.4 Extended Update Support Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:22.1.9-8.el9_4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.4 Extended Update Support Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.13.1-8.el9_4.9 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.20.11-33.el9_6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	unaffected 0:23.2.7-6.el9_6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.14.1-10.el9_6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 10 Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat Enterprise Linux 6 Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: unknown
Red Hat	Red Hat Enterprise Linux 8 Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: xorg-x11-server https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: xorg-x11-server-Xwayland https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: tigervnc https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected

And 2 more products. The full list is on the CVE record.

Identifiers: CVE-2026-34002
CNA: redhat
Weakness (CWE): CWE-805
Tags: Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION
Red Hat Enterprise Linux 7 Extended Lifecycle Support
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
Red Hat Enterprise Linux 8.6 Telecommunications Update Service
Memory corruption
Published: 5 May 2026
Updated: 5 Nov 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.1	Medium	3.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L	CNA (redhat)

CISA KEV Not listed.
EPSS 0.0049, the 42nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

5 May 2026, 14:41 UTC Confirmed by the CVE List
5 May 2026, 16:16 UTC Confirmed by NVD

Sources

References from the CNA

access.redhat.com/errata/RHSA-2026:20547 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:20555 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:20557 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:20558 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:20560 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:20561 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:20562 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:20563 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:20575 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:20576 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:20590 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:21699 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:21712 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:21715 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:21716 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:21718 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:21741 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:21742 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:22424 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:22456 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:23254 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:23255 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:23496 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:24341 vendor-advisoryredhat
access.redhat.com/security/cve/CVE-2026-34002 vdb-entryredhat
bugzilla.redhat.com/show_bug.cgi?id=2451112 issue-trackingredhat

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.