CVE-2025-40211

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 ]

The following products are affected by CVE-2025-40211 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-40211.

URL	Resource
https://git.kernel.org/stable/c/293125536ef5521328815fa7c76d5f9eb1635659
https://git.kernel.org/stable/c/8f067aa59430266386b83c18b983ca583faa6a11
https://git.kernel.org/stable/c/de5fc93275a4a459fe2f7cb746984f2ab3e8292a
https://lore.kernel.org/linux-cve-announce/2025112140-CVE-2025-40211-465b@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2025-40211
https://www.cve.org/CVERecord?id=CVE-2025-40211