CVE-2023-52693 ACPI: video: check for error while searching for backlight device parent

What is CVE-2023-52693?

CVE-2023-52693 is a medium-severity vulnerability in Debian Debian Linux, published on 17 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

ACPI: video: check for error while searching for backlight device parent

If acpi_get_parent() called in acpi_video_dev_register_backlight() fails, for example, because acpi_ut_acquire_mutex() fails inside acpi_get_parent), this can lead to incorrect (uninitialized) acpi_parent handle being passed to acpi_get_pci_dev() for detecting the parent pci device.

Check acpi_get_parent() result and set parent device only in case of success.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Which versions are affected by CVE-2023-52693?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2023-52693?

Apply the vendor's patch.

Is CVE-2023-52693 being exploited?

There is no known exploitation of CVE-2023-52693 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2023-52693, DEBIAN-CVE-2023-52693, GHSA-c363-rc2q-jqjx, UBUNTU-CVE-2023-52693.