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CVE-2025-40211

UnknownEPSS 0.17%

Last modified

CVE-2025-40211 is a vulnerability of currently unknown severity. 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 ]. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

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 ]

Metrics

EPSS Probability
0.17%

6.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7, < 3f803ccf5a0c043e7c8b83f6665b082401fc8bee; >= 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7, < ba1704316492a0496c69334338ea1fdbf4c2fd34; >= 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7, < bc78a4f51d548c1ccc3d1967c2b394bf687c86e9; >= 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7, < a63a5b6fb508d78fe57ae3b159d9ef3af7ba80e9; >= 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7, < 4e85246ec0d019dfba86ba54d841ef6694f97149; >= 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7, < de5fc93275a4a459fe2f7cb746984f2ab3e8292a; >= 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7, < 293125536ef5521328815fa7c76d5f9eb1635659; >= 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7, < 8f067aa59430266386b83c18b983ca583faa6a11
LinuxLinux3.17

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is 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 ]
How severe is CVE-2025-40211?
Severity scoring for CVE-2025-40211 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2025-40211?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST