Debian: CVE-2022-48735: linux -- security update

Debian: CVE-2022-48735: linux -- security update

Severity

7

CVSS

(AV:L/AC:L/Au:S/C:C/I:C/A:C)

Published

06/20/2024

Created

07/31/2024

Added

07/30/2024

Modified

01/30/2025

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: hda: Fix UAF of leds class devs at unbinding The LED class devices that are created by HD-audio codec drivers are registered via devm_led_classdev_register() and associated with the HD-audio codec device.Unfortunately, it turned out that the devres release doesn't work for this case; namely, since the codec resource release happens before the devm call chain, it triggers a NULL dereference or a UAF for a stale set_brightness_delay callback. For fixing the bug, this patch changes the LED class device register and unregister in a manual manner without devres, keeping the instances in hda_gen_spec.

Solution(s)

• debian-upgrade-linux

References

• https://attackerkb.com/topics/cve-2022-48735
• CVE - 2022-48735