CVE-2022-48735
ALSA: hda: Fix UAF of leds class devs at unbinding
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.23% · top 86% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 15509b6344726de22bdbfff88b65341dd0dd33af – < a7de1002135cf94367748ffc695a29812d7633b5
- affected 15509b6344726de22bdbfff88b65341dd0dd33af – < 0e629052f013eeb61494d4df2f1f647c2a9aef47
- affected 15509b6344726de22bdbfff88b65341dd0dd33af – < 813e9f3e06d22e29872d4fd51b54992d89cf66c8
- affected 15509b6344726de22bdbfff88b65341dd0dd33af – < 549f8ffc7b2f7561bea7f90930b6c5104318e87b
- affected 5.9
- unaffected < 5.9
- unaffected 5.10.99 – ≤ 5.10.*
- unaffected 5.15.22 – ≤ 5.15.*
- unaffected 5.16.8 – ≤ 5.16.*
- unaffected 5.17 – ≤ *
References (4)
- https://git.kernel.org/stable/c/a7de1002135cf94367748ffc695a29812d7633b5 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/0e629052f013eeb61494d4df2f1f647c2a9aef47 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/813e9f3e06d22e29872d4fd51b54992d89cf66c8 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/549f8ffc7b2f7561bea7f90930b6c5104318e87b (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-48735)Record last updated .