CVE-2025-40211 - ACPI: video: Fix use-after-free in acpi_video_switch_brightness()

CVE-2025-40211 - ACPI: video: Fix use-after-free in acpi_video_switch_brightness()

https://cvefeed.io/rssfeed/latest.atom / Fri, 11/21/2025 - 13:49
CVE ID : CVE-2025-40211
Published : Nov. 21, 2025, 11:15 a.m. | 24 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved: ACPI: video: Fix use-after-free in acpi_video_switch_brightness() The switch_brightness_work delayed work accesses device->brightness and device->backlight, freed by acpi_video_dev_unregister_backlight() during device removal. If the work executes after acpi_video_bus_unregister_backlight() frees these resources, it causes a use-after-free when acpi_video_switch_brightness() dereferences device->brightness or device->backlight. Fix this by calling cancel_delayed_work_sync() for each device's switch_brightness_work in acpi_video_bus_remove_notify_handler() after removing the notify handler that queues the work. This ensures the work completes before the memory is freed. [ rjw: Changelog edit ]
Severity: 0.0 | NA
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