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Local attackers with a X connection able to provide PCX fonts to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a heap buffer overflow via SetFont due to missing glyph boundary checks.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-develUpgrade xorg-x11-server-XnestUpgrade xorg-x11-server-Xdmx | Jul 13, 2026 | Jul 13, 2026 |
| Alpine Linux | — | Upgrade xorg-serverUpgrade xwayland | Jul 9, 2026 | Jul 8, 2026 |
| Amazon Linux Ami 2 | — | Upgrade xorg-x11-server-debuginfoUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-XnestUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-devel | Jul 22, 2026 | Jul 22, 2026 |
| Amazon_linux_2023 | — | Upgrade xorg-x11-server-XnestUpgrade xorg-x11-server-Xnest-debuginfoUpgrade xorg-x11-server-Xvfb-debuginfoUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-develUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-Xwayland-debugsourceUpgrade xorg-x11-server-Xephyr-debuginfoUpgrade xorg-x11-server-Xwayland-debuginfoUpgrade xorg-x11-server-debugsourceUpgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-debuginfoUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-Xorg-debuginfoUpgrade xorg-x11-server-Xorg | Jul 21, 2026 | Jul 8, 2026 |
| Debian | — | Upgrade xorg-server | Sep 21, 2026 | Jul 8, 2026 |
| Freebsd | — | Upgrade xorg-serverUpgrade xwayland | Jul 9, 2026 | Jul 8, 2026 |
| Gentoo Linux | — | Upgrade x11-base/xorg-server.Upgrade x11-base/xwayland. | Aug 17, 2026 | Aug 17, 2026 |
| Oracle_linux | — | Upgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-develUpgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-XnestUpgrade xorg-x11-server-Xwayland | Oct 22, 2026 | Jul 8, 2026 |
| Redhat_linux | — | Upgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-Xnest-debuginfoUpgrade xorg-x11-server-Xwayland-debuginfoUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-debuginfoUpgrade xorg-x11-server-debugsourceUpgrade xorg-x11-server-Xorg-debuginfoUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-Xwayland-debugsourceUpgrade xorg-x11-server-Xephyr-debuginfoUpgrade xorg-x11-server-develUpgrade xorg-x11-server-XnestUpgrade xorg-x11-server-Xdmx-debuginfoUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-Xvfb-debuginfo | Jul 14, 2026 | Jul 8, 2026 |
| Rocky_linux | — | Upgrade xorg-x11-server-XnestUpgrade xorg-x11-server-Xwayland-debugsourceUpgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-Xvfb-debuginfoUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-Xwayland-debuginfoUpgrade xorg-x11-server-Xephyr-debuginfoUpgrade xorg-x11-server-develUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-debugsourceUpgrade xorg-x11-server-Xdmx-debuginfoUpgrade xorg-x11-server-Xnest-debuginfoUpgrade xorg-x11-server-debuginfoUpgrade xorg-x11-server-Xorg-debuginfo | Jul 15, 2026 | Jul 14, 2026 |
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