A flaw was identified in the X.Org X server’s X Keyboard (Xkb) extension where improper bounds checking in the XkbSetCompatMap() function can cause an unsigned short overflow. If an attacker sends specially crafted input data, the value calculation may overflow, leading to memory corruption or a crash.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade tigervnc-server-minimalUpgrade xorg-x11-server-XorgUpgrade tigervnc-serverUpgrade xorg-x11-server-XwaylandUpgrade tigervnc-server-moduleUpgrade xorg-x11-server-Xwayland-develUpgrade tigervnc-iconsUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-commonUpgrade tigervnc-selinuxUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-develUpgrade tigervnc-licenseUpgrade xorg-x11-server-XdmxUpgrade tigervncUpgrade xorg-x11-server-Xnest | Nov 10, 2025 | Nov 6, 2025 |
| Alpine Linux | — | Upgrade xorg-serverUpgrade xwayland | Nov 7, 2025 | Oct 30, 2025 |
| Amazon Linux Ami 2 | — | Upgrade xorg-x11-server-debuginfoUpgrade xorg-x11-server-develUpgrade tigervnc-serverUpgrade tigervnc-server-appletUpgrade tigervncUpgrade xorg-x11-server-XdmxUpgrade tigervnc-server-minimalUpgrade tigervnc-server-moduleUpgrade xorg-x11-server-commonUpgrade tigervnc-iconsUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-XnestUpgrade tigervnc-debuginfoUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-XephyrUpgrade tigervnc-licenseUpgrade xorg-x11-server-Xvfb | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade xorg-x11-server-XnestUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-develUpgrade tigervnc-iconsUpgrade tigervnc-serverUpgrade tigervnc-server-moduleUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-Xephyr-debuginfoUpgrade tigervnc-server-minimalUpgrade tigervnc-debugsourceUpgrade xorg-x11-server-Xwayland-debugsourceUpgrade xorg-x11-server-debugsourceUpgrade tigervnc-server-debuginfoUpgrade xorg-x11-server-debuginfoUpgrade xorg-x11-server-Xwayland-debuginfoUpgrade tigervnc-debuginfoUpgrade xorg-x11-server-sourceUpgrade tigervnc-licenseUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-Xwayland-develUpgrade tigervnc-server-minimal-debuginfoUpgrade xorg-x11-server-Xorg-debuginfoUpgrade tigervncUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-Xnest-debuginfoUpgrade xorg-x11-server-Xvfb-debuginfoUpgrade tigervnc-selinuxUpgrade tigervnc-server-module-debuginfo | Nov 11, 2025 | Oct 29, 2025 |
| Debian | — | Upgrade xorg-server | Oct 30, 2025 | Oct 30, 2025 |
| Freebsd | — | Upgrade xwaylandUpgrade xorg-server | Dec 10, 2025 | Nov 3, 2025 |
| Gentoo Linux | — | Upgrade x11-base/xwayland.Upgrade x11-base/xorg-server. | Aug 17, 2026 | Aug 17, 2026 |
| Ibm Aix | — | Apply the fix or workaround for xorg_advisory5 | Feb 20, 2026 | Feb 19, 2026 |
| Oracle_linux | — | Upgrade xorg-x11-server-commonUpgrade xorg-x11-server-XwaylandUpgrade tigervnc-licenseUpgrade tigervnc-selinuxUpgrade tigervncUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-XvfbUpgrade tigervnc-server-appletUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-XdmxUpgrade tigervnc-iconsUpgrade tigervnc-server-minimalUpgrade xorg-x11-server-develUpgrade tigervnc-server-moduleUpgrade xorg-x11-server-XnestUpgrade tigervnc-serverUpgrade xorg-x11-server-Xorg | Nov 4, 2025 | Oct 29, 2025 |
| Redhat_linux | — | Upgrade tigervnc-server-moduleUpgrade xorg-x11-server-commonNo solution existsUpgrade tigervnc-serverUpgrade xorg-x11-server-develUpgrade tigervnc-server-minimal-debuginfoUpgrade xorg-x11-server-debugsourceUpgrade xorg-x11-server-XnestUpgrade xorg-x11-server-Xwayland-debugsourceUpgrade tigervnc-debugsourceUpgrade tigervncUpgrade xorg-x11-server-Xnest-debuginfoUpgrade xorg-x11-server-XdmxUpgrade tigervnc-server-debuginfoUpgrade xorg-x11-server-Xwayland-debuginfoUpgrade tigervnc-server-minimalUpgrade xorg-x11-server-Xdmx-debuginfoUpgrade tigervnc-selinuxUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-XwaylandUpgrade tigervnc-server-module-debuginfoUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-Xephyr-debuginfoUpgrade xorg-x11-server-Xvfb-debuginfoUpgrade tigervnc-server-appletUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-debuginfoUpgrade tigervnc-licenseUpgrade xorg-x11-server-Xwayland-develUpgrade tigervnc-debuginfoUpgrade tigervnc-iconsUpgrade xorg-x11-server-Xorg-debuginfo | Nov 4, 2025 | Oct 29, 2025 |
| Rocky_linux | — | Upgrade xorg-x11-server-XdmxUpgrade tigervnc-server-minimal-debuginfoUpgrade tigervnc-server-moduleUpgrade xorg-x11-server-develUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-Xnest-debuginfoUpgrade tigervnc-server-module-debuginfoUpgrade xorg-x11-server-Xorg-debuginfoUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-Xvfb-debuginfoUpgrade tigervnc-debuginfoUpgrade tigervnc-server-minimalUpgrade tigervnc-server-debuginfoUpgrade xorg-x11-server-debuginfoUpgrade xorg-x11-server-Xephyr-debuginfoUpgrade tigervnc-serverUpgrade xorg-x11-server-Xwayland-debuginfoUpgrade xorg-x11-server-XnestUpgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-Xdmx-debuginfoUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-Xwayland-debugsourceUpgrade xorg-x11-server-debugsourceUpgrade tigervnc-debugsourceUpgrade tigervnc | Feb 5, 2026 | Nov 12, 2025 |
| Suse | — | Upgrade xorg-x11-server-sourceUpgrade xorg-x11-server-XvfbUpgrade xwayland-develUpgrade xorg-x11-server-waylandUpgrade xorg-x11-serverUpgrade xorg-x11-server-extraUpgrade xwaylandUpgrade xorg-x11-server-sdk | Dec 5, 2025 | Nov 4, 2025 |
| Ubuntu | — | Upgrade xserver-xorg-coreUpgrade xwayland | Oct 30, 2025 | Oct 29, 2025 |
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