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A heap buffer overflow caused by mismatched size usage in CopyArea CPU-to-FBO path in X.Org X Server before 21.1.15 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in the X server context.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-Xwayland | Oct 20, 2026 | Oct 19, 2026 |
| Alpine Linux | — | Upgrade xwaylandUpgrade xorg-server | Oct 29, 2026 | Oct 28, 2026 |
| Amazon_linux_2023 | — | Upgrade xorg-x11-server-Xwayland-debugsourceUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-Xwayland-debuginfoUpgrade xorg-x11-server-Xwayland-devel | Oct 29, 2026 | Oct 28, 2026 |
| Redhat_linux | — | No solution existsUpgrade xorg-x11-server-Xwayland-debugsourceUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-Xwayland-debuginfo | Oct 13, 2026 | Oct 7, 2026 |
| Rocky_linux | — | Upgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-Xwayland-debuginfoUpgrade xorg-x11-server-Xwayland-debugsource | Oct 22, 2026 | Oct 20, 2026 |
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