Medium · published June 5, 2026
A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow(). A client can trigger a use-after-free read after changing window attributes and forcing the screen saver, leading to information disclosure.
| Product | Versions | Fixed in |
|---|---|---|
| x.org/x_server | < 21.1.23 | 21.1.23 |
| x.org/xwayland | < 24.1.12 | 24.1.12 |
| redhat/enterprise_linux | all versions | — |
| redhat/enterprise_linux | all versions | — |
| redhat/enterprise_linux | all versions | — |
| redhat/enterprise_linux | all versions | — |