In the Linux kernel, the following vulnerability has been resolved: ACPI: video: check for error while searching for backlight device parent If acpigetparent() called in acpivideodevregisterbacklight() fails, for example, because acpiutacquiremutex() fails inside acpigetparent), this can lead to incorrect (uninitialized) acpiparent handle being passed to acpigetpcidev() for detecting the parent pci device. Check acpiget_parent() result and set parent device only in case of success. Found by Linux Verification Center (linuxtesting.org) with SVACE.