Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: fix race condition to UAF in snd_usbmidi_free The previous commit 0718a78f6a9f ("ALSA: usb-audio: Kill timer properly at removal") patched a UAF issue caused by the error timer. However, because the error timer kill added in this patch occurs after the endpoint delete, a race condition to UAF still occurs, albeit rarely. Additionally, since kill-cleanup for urb is also missing, freed memory can be accessed in interrupt context related to urb, which can cause UAF. Therefore, to prevent this, error timer and urb must be killed before freeing the heap memory.
Product status
647410a7da46067953a53c0d03f8680eff570959 before dc4874366cf6cf4a31d8fa4b7f0e2a5b2d7647ba
c611b9e55174e439dcd85a72969b43a95f3827a4 before 647d6b8d22be12842fde6ed0c56859ebc615f21e
0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1 before af600e7f5526d16146b3ae99f6ad57bfea79ca33
0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1 before 353d8c715cc951a980728133c9dd64ca5a0a186c
0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1 before 9f2c0ac1423d5f267e7f1d1940780fc764b0fee3
62066758d2ae169278e5d6aea5995b1b6f6ddeb5
6.16
Any version before 6.16
6.16.11
6.17.1
6.18-rc1
References
git.kernel.org/...c/dc4874366cf6cf4a31d8fa4b7f0e2a5b2d7647ba
git.kernel.org/...c/647d6b8d22be12842fde6ed0c56859ebc615f21e
git.kernel.org/...c/af600e7f5526d16146b3ae99f6ad57bfea79ca33
git.kernel.org/...c/353d8c715cc951a980728133c9dd64ca5a0a186c
git.kernel.org/...c/9f2c0ac1423d5f267e7f1d1940780fc764b0fee3
