A flaw was found in the X Record extension. The RecordSanityCheckRegisterClients function does not check for an integer overflow when computing request length, which allows a client to bypass length checks.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade tigervnc-iconsUpgrade tigervnc-selinuxUpgrade xorg-x11-server-XvfbUpgrade tigervnc-server-moduleUpgrade tigervnc-server-minimalUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-XnestUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-develUpgrade tigervnc-licenseUpgrade tigervncUpgrade tigervnc-serverUpgrade xorg-x11-server-Xwayland-devel | Jul 1, 2025 | Jun 17, 2025 |
| Alpine Linux | — | Upgrade xorg-serverUpgrade xwayland | Aug 8, 2025 | Jun 17, 2025 |
| Amazon Linux Ami 2 | — | Upgrade tigervnc-licenseUpgrade tigervnc-server-minimalUpgrade tigervnc-server-appletUpgrade xorg-x11-server-XorgUpgrade tigervnc-serverUpgrade xorg-x11-server-XnestUpgrade tigervnc-iconsUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-debuginfoUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-develUpgrade tigervnc-server-moduleUpgrade tigervnc-debuginfoUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-XephyrUpgrade tigervnc | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade xorg-x11-server-Xvfb-debuginfoUpgrade tigervnc-server-module-debuginfoUpgrade xorg-x11-server-sourceUpgrade tigervncUpgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-XwaylandUpgrade tigervnc-debuginfoUpgrade tigervnc-licenseUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-XephyrUpgrade tigervnc-selinuxUpgrade xorg-x11-server-Xephyr-debuginfoUpgrade tigervnc-server-minimalUpgrade xorg-x11-server-Xorg-debuginfoUpgrade xorg-x11-server-Xnest-debuginfoUpgrade xorg-x11-server-Xwayland-debuginfoUpgrade xorg-x11-server-XorgUpgrade tigervnc-iconsUpgrade tigervnc-server-moduleUpgrade xorg-x11-server-debuginfoUpgrade tigervnc-server-debuginfoUpgrade tigervnc-debugsourceUpgrade tigervnc-serverUpgrade xorg-x11-server-develUpgrade xorg-x11-server-XnestUpgrade xorg-x11-server-debugsourceUpgrade tigervnc-server-minimal-debuginfoUpgrade xorg-x11-server-Xwayland-debugsource | Jul 11, 2025 | Jun 17, 2025 |
| Debian | — | Upgrade xorg-server | Jun 20, 2025 | Jun 17, 2025 |
| Freebsd | — | Upgrade xorg-serverUpgrade xorg-nextserverUpgrade xephyrUpgrade xorg-vfbserverUpgrade xwayland | Jul 2, 2025 | Jul 1, 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_advisory4 | Oct 14, 2025 | Oct 13, 2025 |
| Oracle_linux | — | Upgrade xorg-x11-server-develUpgrade tigervnc-server-minimalUpgrade tigervnc-serverUpgrade tigervnc-server-appletUpgrade xorg-x11-server-Xwayland-develUpgrade tigervncUpgrade tigervnc-selinuxUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-commonUpgrade tigervnc-iconsUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-XwaylandUpgrade tigervnc-server-moduleUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-XnestUpgrade tigervnc-licenseUpgrade xorg-x11-server-source | Jun 30, 2025 | Jun 17, 2025 |
| Redhat_linux | — | Upgrade xorg-x11-server-Xorg-debuginfoUpgrade tigervnc-server-minimalUpgrade xorg-x11-server-debuginfoUpgrade tigervnc-server-minimal-debuginfoUpgrade tigervnc-selinuxUpgrade xorg-x11-server-Xwayland-debuginfoUpgrade tigervnc-serverUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-debugsourceUpgrade tigervnc-server-appletUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-Xwayland-develUpgrade tigervnc-iconsUpgrade tigervnc-server-module-debuginfoUpgrade tigervnc-server-moduleUpgrade tigervnc-debugsourceUpgrade xorg-x11-server-Xwayland-debugsourceUpgrade xorg-x11-server-develUpgrade tigervnc-server-debuginfoUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-Xnest-debuginfoUpgrade xorg-x11-server-Xdmx-debuginfoUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-Xephyr-debuginfoUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-XnestUpgrade tigervncUpgrade tigervnc-licenseNo solution existsUpgrade xorg-x11-server-Xvfb-debuginfoUpgrade xorg-x11-server-sourceUpgrade tigervnc-debuginfoUpgrade xorg-x11-server-common | Jun 26, 2025 | Jun 17, 2025 |
| Rocky_linux | — | Upgrade xorg-x11-server-Xwayland-debuginfoUpgrade xorg-x11-server-Xorg-debuginfoUpgrade xorg-x11-server-XwaylandUpgrade tigervnc-server-minimalUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-Xnest-debuginfoUpgrade tigervnc-debuginfoUpgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-debuginfoUpgrade tigervnc-server-module-debuginfoUpgrade xorg-x11-server-develUpgrade tigervnc-server-moduleUpgrade tigervnc-serverUpgrade xorg-x11-server-Xephyr-debuginfoUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-XnestUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-Xdmx-debuginfoUpgrade tigervncUpgrade xorg-x11-server-Xvfb-debuginfoUpgrade xorg-x11-server-debugsourceUpgrade tigervnc-server-debuginfoUpgrade tigervnc-debugsourceUpgrade tigervnc-server-minimal-debuginfoUpgrade xorg-x11-server-Xwayland-debugsource | Jul 31, 2025 | Jul 29, 2025 |
| Suse | — | Upgrade xorg-x11-server-extraUpgrade xwayland-develUpgrade xorg-x11-server-sourceUpgrade xwaylandUpgrade xorg-x11-server-sdkUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-waylandUpgrade xorg-x11-server | Dec 5, 2025 | Jul 25, 2025 |
| Ubuntu | — | Upgrade xserver-xorg-core (Ubuntu Pro)Upgrade xwayland (Ubuntu Pro)Upgrade xserver-xorg-coreUpgrade xserver-xorg-core-hwe-18.04 (Ubuntu Pro)Upgrade xwayland-hwe-16.04 (Ubuntu Pro)Upgrade xwaylandUpgrade xserver-xorg-core-hwe-16.04 (Ubuntu Pro)Upgrade xwayland-hwe-18.04 (Ubuntu Pro) | Jun 18, 2025 | Jun 17, 2025 |
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