# CVE-2026-34002: xorg-x11-server: This update for xorg-x11-server fixes the following issues:  - CVE-2026-33999: XKB integer underflow in XkbSetCompatM...

CVE-2026-34002 is fixed in 40 products on 1 platform, first by SUSE-SU-2026:1328-1, released April 14, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2026-34002
- Priority: Urgent
- CVSS: 9.1 (critical)
- EPSS: 0.0049
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 14, 2026

## Description

This update for xorg-x11-server fixes the following issues:  - CVE-2026-33999: XKB integer underflow in XkbSetCompatMap() (bsc#1260922). - CVE-2026-34000: XKB out-of-bounds read in CheckSetGeom() (bsc#1260923). - CVE-2026-34001: XSYNC use-after-free in miSyncTriggerFence() (bsc#1260924). - CVE-2026-34002: XKB out-of-bounds read in CheckModifierMap() (bsc#1260925). - CVE-2026-34003: XKB buffer overflow in CheckKeyTypes() (bsc#1260926).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | tigervnc Fedora 43 | 1.16.2-4.fc43 | [FEDORA-2026-AD10AFA9CD](https://patchblox.com/security/data/fix/linux/fedora-2026-ad10afa9cd.md) | Jun 18, 2026 |
| Linux | tigervnc amzn 2023 | 1.14.1-3.amzn2023.0.5 | [ALAS2023-2026-1626](https://patchblox.com/security/data/fix/linux/alas2023-2026-1626.md) | Apr 27, 2026 |
| Linux | tigervnc-debuginfo Fedora 43 | 1.16.2-4.fc43 | [FEDORA-2026-AD10AFA9CD](https://patchblox.com/security/data/fix/linux/fedora-2026-ad10afa9cd.md) | Jun 18, 2026 |
| Linux | tigervnc-debuginfo amzn 2023 | 1.14.1-3.amzn2023.0.5 | [ALAS2023-2026-1626](https://patchblox.com/security/data/fix/linux/alas2023-2026-1626.md) | Apr 27, 2026 |
| Linux | tigervnc-debugsource Fedora 43 | 1.16.2-4.fc43 | [FEDORA-2026-AD10AFA9CD](https://patchblox.com/security/data/fix/linux/fedora-2026-ad10afa9cd.md) | Jun 18, 2026 |
| Linux | tigervnc-debugsource amzn 2023 | 1.14.1-3.amzn2023.0.5 | [ALAS2023-2026-1626](https://patchblox.com/security/data/fix/linux/alas2023-2026-1626.md) | Apr 27, 2026 |
| Linux | tigervnc-icons Fedora 43 | 1.16.2-4.fc43 | [FEDORA-2026-AD10AFA9CD](https://patchblox.com/security/data/fix/linux/fedora-2026-ad10afa9cd.md) | Jun 18, 2026 |
| Linux | tigervnc-icons amzn 2023 | 1.14.1-3.amzn2023.0.5 | [ALAS2023-2026-1626](https://patchblox.com/security/data/fix/linux/alas2023-2026-1626.md) | Apr 27, 2026 |
| Linux | tigervnc-license Fedora 43 | 1.16.2-4.fc43 | [FEDORA-2026-AD10AFA9CD](https://patchblox.com/security/data/fix/linux/fedora-2026-ad10afa9cd.md) | Jun 18, 2026 |
| Linux | tigervnc-license amzn 2023 | 1.14.1-3.amzn2023.0.5 | [ALAS2023-2026-1626](https://patchblox.com/security/data/fix/linux/alas2023-2026-1626.md) | Apr 27, 2026 |
| Linux | tigervnc-selinux Fedora 43 | 1.16.2-4.fc43 | [FEDORA-2026-AD10AFA9CD](https://patchblox.com/security/data/fix/linux/fedora-2026-ad10afa9cd.md) | Jun 18, 2026 |
| Linux | tigervnc-selinux amzn 2023 | 1.14.1-3.amzn2023.0.5 | [ALAS2023-2026-1626](https://patchblox.com/security/data/fix/linux/alas2023-2026-1626.md) | Apr 27, 2026 |
| Linux | tigervnc-server amzn 2023 | 1.14.1-3.amzn2023.0.5 | [ALAS2023-2026-1626](https://patchblox.com/security/data/fix/linux/alas2023-2026-1626.md) | Apr 27, 2026 |
| Linux | tigervnc-server-common Fedora 43 | 1.16.2-4.fc43 | [FEDORA-2026-AD10AFA9CD](https://patchblox.com/security/data/fix/linux/fedora-2026-ad10afa9cd.md) | Jun 18, 2026 |
| Linux | tigervnc-server-common-debuginfo Fedora 43 | 1.16.2-4.fc43 | [FEDORA-2026-AD10AFA9CD](https://patchblox.com/security/data/fix/linux/fedora-2026-ad10afa9cd.md) | Jun 18, 2026 |
| Linux | tigervnc-server-debuginfo amzn 2023 | 1.14.1-3.amzn2023.0.5 | [ALAS2023-2026-1626](https://patchblox.com/security/data/fix/linux/alas2023-2026-1626.md) | Apr 27, 2026 |
| Linux | tigervnc-server-minimal amzn 2023 | 1.14.1-3.amzn2023.0.5 | [ALAS2023-2026-1626](https://patchblox.com/security/data/fix/linux/alas2023-2026-1626.md) | Apr 27, 2026 |
| Linux | tigervnc-server-minimal-debuginfo amzn 2023 | 1.14.1-3.amzn2023.0.5 | [ALAS2023-2026-1626](https://patchblox.com/security/data/fix/linux/alas2023-2026-1626.md) | Apr 27, 2026 |
| Linux | tigervnc-server-module amzn 2023 | 1.14.1-3.amzn2023.0.5 | [ALAS2023-2026-1626](https://patchblox.com/security/data/fix/linux/alas2023-2026-1626.md) | Apr 27, 2026 |
| Linux | tigervnc-server-module-debuginfo amzn 2023 | 1.14.1-3.amzn2023.0.5 | [ALAS2023-2026-1626](https://patchblox.com/security/data/fix/linux/alas2023-2026-1626.md) | Apr 27, 2026 |
| Linux | tigervnc-wayland-server Fedora 43 | 1.16.2-4.fc43 | [FEDORA-2026-AD10AFA9CD](https://patchblox.com/security/data/fix/linux/fedora-2026-ad10afa9cd.md) | Jun 18, 2026 |
| Linux | tigervnc-wayland-server-debuginfo Fedora 43 | 1.16.2-4.fc43 | [FEDORA-2026-AD10AFA9CD](https://patchblox.com/security/data/fix/linux/fedora-2026-ad10afa9cd.md) | Jun 18, 2026 |
| Linux | tigervnc-x11-server Fedora 43 | 1.16.2-4.fc43 | [FEDORA-2026-AD10AFA9CD](https://patchblox.com/security/data/fix/linux/fedora-2026-ad10afa9cd.md) | Jun 18, 2026 |
| Linux | tigervnc-x11-server-debuginfo Fedora 43 | 1.16.2-4.fc43 | [FEDORA-2026-AD10AFA9CD](https://patchblox.com/security/data/fix/linux/fedora-2026-ad10afa9cd.md) | Jun 18, 2026 |
| Linux | tigervnc-x11-server-module Fedora 43 | 1.16.2-4.fc43 | [FEDORA-2026-AD10AFA9CD](https://patchblox.com/security/data/fix/linux/fedora-2026-ad10afa9cd.md) | Jun 18, 2026 |
| Linux | tigervnc-x11-server-module-debuginfo Fedora 43 | 1.16.2-4.fc43 | [FEDORA-2026-AD10AFA9CD](https://patchblox.com/security/data/fix/linux/fedora-2026-ad10afa9cd.md) | Jun 18, 2026 |
| Linux | xorg-server Debian 12.15 (bookworm) | 2:21.1.7-3+deb12u12 | [DEBIAN-CVE-2026-34002](https://patchblox.com/security/data/fix/linux/debian-cve-2026-34002.md) | May 15, 2026 |
| Linux | xorg-server Debian 13.5 (trixie) | 2:21.1.16-1.3+deb13u2 | [DEBIAN-CVE-2026-34002](https://patchblox.com/security/data/fix/linux/debian-cve-2026-34002.md) | May 15, 2026 |
| Linux | xorg-server Debian 14 | 2:21.1.22-1 | [DEBIAN-CVE-2026-34002](https://patchblox.com/security/data/fix/linux/debian-cve-2026-34002.md) | May 15, 2026 |
| Linux | xorg-x11-server opensuse-leap 15.6 | 21.1.11-150600.5.25.1 | [SUSE-SU-2026:1331-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1331-1.md) | Apr 14, 2026 |
| Linux | xorg-x11-server opensuse-leap 16.0 | 21.1.15-160000.4.1 | [OPENSUSE-SU-2026:20544-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20544-1.md) | Apr 15, 2026 |
| Linux | xorg-x11-server sles 15.6 | 21.1.11-150600.5.25.1 | [SUSE-SU-2026:1331-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1331-1.md) | Apr 14, 2026 |
| Linux | xorg-x11-server sles 15.7 | 21.1.15-150700.5.16.1 | [SUSE-SU-2026:1330-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1330-1.md) | Apr 14, 2026 |
| Linux | xorg-x11-server-Xephyr amzn 2023 | 21.1.13-5.amzn2023.0.9 | [ALAS2023-2026-1614](https://patchblox.com/security/data/fix/linux/alas2023-2026-1614.md) | Apr 27, 2026 |
| Linux | xorg-x11-server-Xephyr-debuginfo amzn 2023 | 21.1.13-5.amzn2023.0.9 | [ALAS2023-2026-1614](https://patchblox.com/security/data/fix/linux/alas2023-2026-1614.md) | Apr 27, 2026 |
| Linux | xorg-x11-server-Xnest amzn 2023 | 21.1.13-5.amzn2023.0.9 | [ALAS2023-2026-1614](https://patchblox.com/security/data/fix/linux/alas2023-2026-1614.md) | Apr 27, 2026 |
| Linux | xorg-x11-server-Xnest-debuginfo amzn 2023 | 21.1.13-5.amzn2023.0.9 | [ALAS2023-2026-1614](https://patchblox.com/security/data/fix/linux/alas2023-2026-1614.md) | Apr 27, 2026 |
| Linux | xorg-x11-server-Xorg amzn 2023 | 21.1.13-5.amzn2023.0.9 | [ALAS2023-2026-1614](https://patchblox.com/security/data/fix/linux/alas2023-2026-1614.md) | Apr 27, 2026 |
| Linux | xorg-x11-server-Xorg-debuginfo amzn 2023 | 21.1.13-5.amzn2023.0.9 | [ALAS2023-2026-1614](https://patchblox.com/security/data/fix/linux/alas2023-2026-1614.md) | Apr 27, 2026 |
| Linux | xorg-x11-server-Xvfb amzn 2023 | 21.1.13-5.amzn2023.0.9 | [ALAS2023-2026-1614](https://patchblox.com/security/data/fix/linux/alas2023-2026-1614.md) | Apr 27, 2026 |
| Linux | xorg-x11-server-Xvfb-debuginfo amzn 2023 | 21.1.13-5.amzn2023.0.9 | [ALAS2023-2026-1614](https://patchblox.com/security/data/fix/linux/alas2023-2026-1614.md) | Apr 27, 2026 |
| Linux | xorg-x11-server-Xwayland RHEL 10 | 24.1.5-6.el10_0 | [RHSA-2026:20563](https://patchblox.com/security/data/fix/linux/rhsa-2026-20563.md) | Apr 30, 2026 |
| Linux | xorg-x11-server-Xwayland amzn 2023 | 24.1.3-1.amzn2023.0.4 | [ALAS2023-2026-1613](https://patchblox.com/security/data/fix/linux/alas2023-2026-1613.md) | Apr 27, 2026 |
| Linux | xorg-x11-server-Xwayland-debuginfo amzn 2023 | 24.1.3-1.amzn2023.0.4 | [ALAS2023-2026-1613](https://patchblox.com/security/data/fix/linux/alas2023-2026-1613.md) | Apr 27, 2026 |
| Linux | xorg-x11-server-Xwayland-debugsource amzn 2023 | 24.1.3-1.amzn2023.0.4 | [ALAS2023-2026-1613](https://patchblox.com/security/data/fix/linux/alas2023-2026-1613.md) | Apr 27, 2026 |
| Linux | xorg-x11-server-Xwayland-devel amzn 2023 | 24.1.3-1.amzn2023.0.4 | [ALAS2023-2026-1613](https://patchblox.com/security/data/fix/linux/alas2023-2026-1613.md) | Apr 27, 2026 |
| Linux | xorg-x11-server-common amzn 2023 | 21.1.13-5.amzn2023.0.9 | [ALAS2023-2026-1614](https://patchblox.com/security/data/fix/linux/alas2023-2026-1614.md) | Apr 27, 2026 |
| Linux | xorg-x11-server-debuginfo amzn 2023 | 21.1.13-5.amzn2023.0.9 | [ALAS2023-2026-1614](https://patchblox.com/security/data/fix/linux/alas2023-2026-1614.md) | Apr 27, 2026 |
| Linux | xorg-x11-server-debugsource amzn 2023 | 21.1.13-5.amzn2023.0.9 | [ALAS2023-2026-1614](https://patchblox.com/security/data/fix/linux/alas2023-2026-1614.md) | Apr 27, 2026 |
| Linux | xorg-x11-server-devel amzn 2023 | 21.1.13-5.amzn2023.0.9 | [ALAS2023-2026-1614](https://patchblox.com/security/data/fix/linux/alas2023-2026-1614.md) | Apr 27, 2026 |
| Linux | xorg-x11-server-source amzn 2023 | 21.1.13-5.amzn2023.0.9 | [ALAS2023-2026-1614](https://patchblox.com/security/data/fix/linux/alas2023-2026-1614.md) | Apr 27, 2026 |
| Linux | xwayland Debian 14 | 2:24.1.10-1 | [DEBIAN-CVE-2026-34002](https://patchblox.com/security/data/fix/linux/debian-cve-2026-34002.md) | May 15, 2026 |
| Linux | xwayland opensuse-leap 15.6 | 24.1.1-150600.5.23.1 | [SUSE-SU-2026:1329-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1329-1.md) | Apr 14, 2026 |
| Linux | xwayland opensuse-leap 16.0 | 24.1.6-160000.4.1 | [OPENSUSE-SU-2026:20560-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20560-1.md) | Apr 17, 2026 |
| Linux | xwayland sles 15.7 | 24.1.5-150700.3.14.1 | [SUSE-SU-2026:1328-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1328-1.md) | Apr 14, 2026 |
| Linux | xwayland sles 16.0 | 24.1.6-160000.4.1 | [SUSE-SU-2026:21211-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-21211-1.md) | Apr 17, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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