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Review reviewHigh

CVE-2022-48735

Linux Linux, linux kernel

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 unre...

CVSS
7.8
EPSS
0.23%
14.3% percentile
CISA KEV
Not listed
Published
2024.06.20
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.23%
Technical severityCVSS 7.8

Vulnerability overview

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 unre...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 15509b6344726de22bdbfff88b65341dd0dd33af < a7de1002135cf94367748ffc695a29812d7633b5, >= 15509b6344726de22bdbfff88b65341dd0dd33af < 0e629052f013eeb61494d4df2f1f647c2a9aef47, >= 15509b6344726de22bdbfff88b65341dd0dd33af < 813e9f3e06d22e29872d4fd51b54992d89cf66c8, >= 15509b6344726de22bdbfff88b65341dd0dd33af < 549f8ffc7b2f7561bea7f90930b6c5104318e87b, >= 5.9, >= 5.9 < 5.10.99, >= 5.11 < 5.15.22, >= 5.16 < 5.16.8, 5.17
Fixed versions
5.10.99, 5.15.22, 5.16.8

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416, CWE-476
CVE-2022-48735 — Linux Linux, linux kernel | SECUFOCUS NOW