A flaw was discovered in the X.Org X server’s X Keyboard (Xkb) extension when handling client resource cleanup. The software frees certain data structures without properly detaching related resources, leading to a use-after-free condition. This can cause memory corruption or a crash when affected clients disconnect.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade tigervncUpgrade tigervnc-server-minimalUpgrade xorg-x11-server-Xwayland-develUpgrade tigervnc-serverUpgrade xorg-x11-server-develUpgrade tigervnc-selinuxUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-XvfbUpgrade tigervnc-server-moduleUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-sourceUpgrade tigervnc-iconsUpgrade xorg-x11-server-XdmxUpgrade tigervnc-licenseUpgrade xorg-x11-server-Xnest | Nov 10, 2025 | Nov 6, 2025 |
| Alpine Linux | — | Upgrade xwaylandUpgrade xorg-server | Nov 6, 2025 | Oct 30, 2025 |
| Amazon Linux Ami 2 | — | Upgrade tigervnc-server-minimalUpgrade tigervncUpgrade xorg-x11-server-XvfbUpgrade tigervnc-server-appletUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-debuginfoUpgrade xorg-x11-server-develUpgrade tigervnc-debuginfoUpgrade tigervnc-licenseUpgrade tigervnc-serverUpgrade tigervnc-iconsUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-XnestUpgrade xorg-x11-server-XephyrUpgrade tigervnc-server-module | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade xorg-x11-server-XorgUpgrade tigervnc-selinuxUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-debuginfoUpgrade tigervnc-debuginfoUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-XephyrUpgrade tigervnc-iconsUpgrade tigervnc-server-module-debuginfoUpgrade tigervnc-server-minimalUpgrade xorg-x11-server-Xnest-debuginfoUpgrade xorg-x11-server-Xorg-debuginfoUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-Xwayland-debuginfoUpgrade xorg-x11-server-develUpgrade tigervnc-server-minimal-debuginfoUpgrade xorg-x11-server-debugsourceUpgrade tigervnc-serverUpgrade xorg-x11-server-Xvfb-debuginfoUpgrade xorg-x11-server-commonUpgrade tigervnc-server-moduleUpgrade tigervnc-debugsourceUpgrade xorg-x11-server-Xephyr-debuginfoUpgrade xorg-x11-server-Xwayland-debugsourceUpgrade xorg-x11-server-XnestUpgrade tigervnc-licenseUpgrade tigervnc-server-debuginfoUpgrade tigervnc | Nov 11, 2025 | Oct 29, 2025 |
| Debian | — | Upgrade xorg-server | Oct 30, 2025 | Oct 30, 2025 |
| Freebsd | — | Upgrade xorg-serverUpgrade xwayland | Dec 10, 2025 | Nov 3, 2025 |
| Gentoo Linux | — | Upgrade x11-base/xorg-server.Upgrade x11-base/xwayland. | 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-XdmxUpgrade tigervncUpgrade tigervnc-server-appletUpgrade tigervnc-serverUpgrade xorg-x11-server-develUpgrade xorg-x11-server-sourceUpgrade tigervnc-server-moduleUpgrade xorg-x11-server-commonUpgrade tigervnc-iconsUpgrade xorg-x11-server-XephyrUpgrade tigervnc-selinuxUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-XorgUpgrade tigervnc-licenseUpgrade xorg-x11-server-XvfbUpgrade tigervnc-server-minimalUpgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-Xnest | Nov 4, 2025 | Oct 29, 2025 |
| Redhat_linux | — | Upgrade xorg-x11-server-Xnest-debuginfoUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-debugsourceUpgrade xorg-x11-server-sourceUpgrade tigervnc-debuginfoUpgrade tigervnc-server-debuginfoUpgrade xorg-x11-server-debuginfoNo solution existsUpgrade tigervnc-server-module-debuginfoUpgrade tigervnc-debugsourceUpgrade tigervnc-server-minimal-debuginfoUpgrade xorg-x11-server-Xorg-debuginfoUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-develUpgrade tigervncUpgrade tigervnc-server-moduleUpgrade xorg-x11-server-Xwayland-debuginfoUpgrade xorg-x11-server-XorgUpgrade tigervnc-iconsUpgrade xorg-x11-server-XvfbUpgrade tigervnc-licenseUpgrade tigervnc-serverUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-Xdmx-debuginfoUpgrade tigervnc-server-appletUpgrade xorg-x11-server-Xvfb-debuginfoUpgrade xorg-x11-server-XnestUpgrade xorg-x11-server-Xephyr-debuginfoUpgrade tigervnc-selinuxUpgrade xorg-x11-server-Xwayland-debugsourceUpgrade tigervnc-server-minimal | Nov 4, 2025 | Oct 29, 2025 |
| Rocky_linux | — | Upgrade xorg-x11-server-debuginfoUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-debugsourceUpgrade xorg-x11-server-Xnest-debuginfoUpgrade tigervnc-server-minimal-debuginfoUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-Xorg-debuginfoUpgrade tigervnc-server-moduleUpgrade xorg-x11-server-Xwayland-debugsourceUpgrade xorg-x11-server-Xephyr-debuginfoUpgrade xorg-x11-server-XnestUpgrade tigervnc-debugsourceUpgrade tigervnc-server-minimalUpgrade tigervnc-server-debuginfoUpgrade xorg-x11-server-Xwayland-debuginfoUpgrade xorg-x11-server-XdmxUpgrade tigervnc-serverUpgrade xorg-x11-server-develUpgrade xorg-x11-server-Xvfb-debuginfoUpgrade xorg-x11-server-XwaylandUpgrade tigervncUpgrade xorg-x11-server-Xwayland-develUpgrade tigervnc-server-module-debuginfoUpgrade tigervnc-debuginfoUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-Xdmx-debuginfo | Feb 5, 2026 | Nov 12, 2025 |
| Suse | — | Upgrade xorg-x11-server-extraUpgrade xorg-x11-server-sdkUpgrade xwayland-develUpgrade xorg-x11-server-waylandUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-XvfbUpgrade xwaylandUpgrade xorg-x11-server | Dec 5, 2025 | Nov 4, 2025 |
| Ubuntu | — | Upgrade xwaylandUpgrade xserver-xorg-core | Oct 30, 2025 | Oct 29, 2025 |
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