GHSA-8337-3p73-46f4 Electron: Use-after-free in WebContents fullscreen, pointer-lock, and keyboard-lock permission callbacks

• npm electron: < 38.8.6 → fixed in 38.8.6 • npm electron: >= 39.0.0-alpha.1, < 39.8.0 → fixed in 39.8.0 • npm electron: >= 40.0.0-alpha.1, < 40.7.0 → fixed in 40.7.0 • npm electron: >= 41.0.0-alpha.1, < 41.0.0-beta.8 → fixed in 41.0.0-beta.8

Impact Apps that register an asynchronous `session.setPermissionRequestHandler()` may be vulnerable to a use-after-free when handling fullscreen, pointer-lock, or keyboard-lock permission requests. If the requesting frame navigates or the window closes while the permission handler is pending, invoking the stored callback dereferences freed memory, which may lead to a crash or memory corruption. Apps that do not set a permission request handler, or whose handler responds synchronously, are not affected. Workarounds Respond to permission requests synchronously, or deny fullscreen, pointer-lock, and keyboard-lock requests if an asynchronous flow is required. Fixed Versions • `41.0.0-beta.8` • `40.7.0` • `39.8.0` • `38.8.6` For more information If there are any questions or comments about this advisory, please email [email protected]