Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.9, < 5.10.99 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0e629052f013eeb61494d4df2f1f647c2a9aef47Patch
- https://git.kernel.org/stable/c/549f8ffc7b2f7561bea7f90930b6c5104318e87bPatch
- https://git.kernel.org/stable/c/813e9f3e06d22e29872d4fd51b54992d89cf66c8Patch
- https://git.kernel.org/stable/c/a7de1002135cf94367748ffc695a29812d7633b5Patch
- https://git.kernel.org/stable/c/0e629052f013eeb61494d4df2f1f647c2a9aef47Patch
- https://git.kernel.org/stable/c/549f8ffc7b2f7561bea7f90930b6c5104318e87bPatch
- https://git.kernel.org/stable/c/813e9f3e06d22e29872d4fd51b54992d89cf66c8Patch
- https://git.kernel.org/stable/c/a7de1002135cf94367748ffc695a29812d7633b5Patch
FAQ
What is CVE-2022-48735?
CVE-2022-48735 is a vulnerability with a CVSS score of 7.8 (HIGH). 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...
How severe is CVE-2022-48735?
CVE-2022-48735 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-48735?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.