Ubuntu: (CVE-2022-48735): linux-intel-iotg-5.15 vulnerability

Ubuntu: (CVE-2022-48735): linux-intel-iotg-5.15 vulnerability

Severity

7

CVSS

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

Published

06/20/2024

Created

11/21/2024

Added

11/19/2024

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)

• ubuntu-upgrade-linux-intel-iotg-5-15

References

• https://attackerkb.com/topics/cve-2022-48735
• CVE - 2022-48735
• https://git.kernel.org/linus/549f8ffc7b2f7561bea7f90930b6c5104318e87b
• https://git.kernel.org/stable/c/0e629052f013eeb61494d4df2f1f647c2a9aef47
• https://git.kernel.org/stable/c/549f8ffc7b2f7561bea7f90930b6c5104318e87b
• https://git.kernel.org/stable/c/813e9f3e06d22e29872d4fd51b54992d89cf66c8
• https://git.kernel.org/stable/c/a7de1002135cf94367748ffc695a29812d7633b5
• https://www.cve.org/CVERecord?id=CVE-2022-48735

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