CVE-2022-48735
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.23%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.23% probability · 14th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416, CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.