CVE-2024-11698

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 133 Firefox ESR versions prior to 128.5 Thunderbird versions prior to 133 Thunderbird versions prior to 128.5

Description A flaw in handling fullscreen transitions may have caused the application to become stuck in fullscreen mode when a modal dialog was opened during the transition. This issue left users unable to exit fullscreen mode using standard actions, resulting in a disrupted browsing experience until the browser is restarted. The bug only affects the application when running on macOS, with other operating systems being unaffected.

Recommendations For Firefox versions prior to 133, update to version 133 or later to resolve the issue. For Firefox ESR versions prior to 128.5, update to version 128.5 or later to resolve the issue. For Thunderbird versions prior to 133, update to version 133 or later to resolve the issue. For Thunderbird versions prior to 128.5, update to version 128.5 or later to resolve the issue. As a temporary workaround, consider restarting the browser to exit fullscreen mode until a patch is available.