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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 12 | all | linux | < 5.16.10-1 | linux_5.16.10-1_all.deb |
Debian | 11 | all | linux | < 5.10.103-1 | linux_5.10.103-1_all.deb |
Debian | 10 | all | linux | <= 4.19.249-2 | linux_4.19.249-2_all.deb |
Debian | 999 | all | linux | < 5.16.10-1 | linux_5.16.10-1_all.deb |
Debian | 13 | all | linux | < 5.16.10-1 | linux_5.16.10-1_all.deb |