Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-007370)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-007370 advisory. In the Linux kernel, the following vulnerability has been resolved: ACPI: video: Fix use-after-free in acpivideoswitchbrightness The switchbrightnesswork delayed wor...

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

In the Linux kernel, the following vulnerability has been resolved: ACPI: video: Fix use-after-free in acpivideoswitchbrightness The switchbrightnesswork delayed work accesses device-brightness and device-backlight, freed by acpivideodevunregisterbacklight during device removal. If the work...

CVE-2025-40211

In CVE-2025-40211, a Linux kernel ACPI code path (ACPI: video) had a use-after-free in acpi_video_switch_brightness() where switch_brightness_work accesses device fields after the backlight was freed during removal. The patch prevents this by calling cancel_delayed_work_sync() for each device’s s...