CVE-2022-50229

Summary

In the Linux kernel, the following vulnerability has been resolved:

ALSA: bcd2000: Fix a UAF bug on the error path of probing

When the driver fails in snd_card_register() at probe time, it will free the 'bcd2k->midi_out_urb' before killing it, which may cause a UAF bug.

The following log can reveal it:

[ 50.727020] BUG: KASAN: use-after-free in bcd2000_input_complete+0x1f1/0x2e0 [snd_bcd2000] [ 50.727623] Read of size 8 at addr ffff88810fab0e88 by task swapper/4/0 [ 50.729530] Call Trace: [ 50.732899] bcd2000_input_complete+0x1f1/0x2e0 [snd_bcd2000]

Fix this by adding usb_kill_urb() before usb_free_urb().

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxb47a22290d581277be70e8a597824a4985d39e83 < a718eba7e458e2f40531be3c6b6a0028ca7fcaceaffected
LinuxLinuxb47a22290d581277be70e8a597824a4985d39e83 < 4fc41f7ebb7efca282f1740ea934d16f33c1d109affected
LinuxLinuxb47a22290d581277be70e8a597824a4985d39e83 < 5e7338f4dd92b2f8915a82abfa1dd3ad3464bea0affected
LinuxLinuxb47a22290d581277be70e8a597824a4985d39e83 < 05e0bb8c3c4dde3e21b9c1cf9395afb04e8b24dbaffected
LinuxLinuxb47a22290d581277be70e8a597824a4985d39e83 < 348620464a5c127399ac09b266f494f393661952affected
LinuxLinuxb47a22290d581277be70e8a597824a4985d39e83 < 64ca7f50ad96c2c65ae390b954925a36eabe04aaaffected
LinuxLinuxb47a22290d581277be70e8a597824a4985d39e83 < 1d6a246cf97c380f2da76591f03019dd9c9599c3affected
LinuxLinuxb47a22290d581277be70e8a597824a4985d39e83 < b0d4af0a4763ddc02344789ef2a281c494bc330daffected
LinuxLinuxb47a22290d581277be70e8a597824a4985d39e83 < ffb2759df7efbc00187bfd9d1072434a13a54139affected
LinuxLinux3.16affected
LinuxLinux0 < 3.16unaffected
LinuxLinux4.9.326 <= 4.9.*unaffected
LinuxLinux4.14.291 <= 4.14.*unaffected
LinuxLinux4.19.256 <= 4.19.*unaffected
LinuxLinux5.4.211 <= 5.4.*unaffected
LinuxLinux5.10.137 <= 5.10.*unaffected
LinuxLinux5.15.61 <= 5.15.*unaffected
LinuxLinux5.18.18 <= 5.18.*unaffected
LinuxLinux5.19.2 <= 5.19.*unaffected
LinuxLinux6.0 <= *unaffected

Weaknesses

References