CVEvulnerability

CVE-2022-48735

7.8 HIGH Published 2024-06-20 Modified 2026-08-04 Official page ↗
Status
Modified
Published
2024-06-20
Last modified
2026-08-04
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-416, CWE-476

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.

Affected configurations

• linux linux kernel (>= 5.9 < 5.10.99) • linux linux kernel (>= 5.11 < 5.15.22) • linux linux kernel (>= 5.16 < 5.16.8) • linux linux kernel 5.17

Related

Weakness · CWE (2)

  • CWE-416 Use After Free weakness
  • CWE-476 NULL Pointer Dereference weakness

References