CVE-2022-48735

HighCVSS 7.8/10Last modified Aug 4, 2026

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416CWE-476

Affected software

VendorProductVersions
LinuxLinux>= 15509b6344726de22bdbfff88b65341dd0dd33af, < a7de1002135cf94367748ffc695a29812d7633b5; >= 15509b6344726de22bdbfff88b65341dd0dd33af, < 0e629052f013eeb61494d4df2f1f647c2a9aef47; >= 15509b6344726de22bdbfff88b65341dd0dd33af, < 813e9f3e06d22e29872d4fd51b54992d89cf66c8; >= 15509b6344726de22bdbfff88b65341dd0dd33af, < 549f8ffc7b2f7561bea7f90930b6c5104318e87b
LinuxLinux5.9

References

Timeline

Published
Jun 20, 2024
Last modified
Aug 4, 2026
NVD status
Modified

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CVE-2022-48735: High severity, CVSS 7.8 | Vulnix