PT-2025-47719 · Linux+3 · Linux Kernel+3
Published
2025-10-22
·
Updated
2026-05-26
·
CVE-2025-40211
CVSS v2.0
6.0
Medium
| Vector | AV:L/AC:H/Au:S/C:C/I:C/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A use-after-free issue exists in the ACPI video driver, specifically within the
acpi video switch brightness() function. The problem occurs because delayed work accesses memory locations (device->brightness and device->backlight) that have already been freed during device removal. This happens when the switch brightness work delayed work executes after the memory has been released by acpi video dev unregister backlight(). The fix involves calling cancel delayed work sync() to ensure the work completes before the memory is freed.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use After Free
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Debian
Linuxmint
Linux Kernel
Ubuntu