7.8

CVE-2022-50229

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

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().
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.16 < 4.9.326
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.291
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.256
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.211
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.137
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.61
Linux ≫ Linux Kernel Version >= 5.16 < 5.18.18
Linux ≫ Linux Kernel Version >= 5.19 < 5.19.2
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.2% 0.105
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/a718eba7e458e2f40531be3c6b6a0028ca7fcace
Patch
https://git.kernel.org/stable/c/4fc41f7ebb7efca282f1740ea934d16f33c1d109
Patch
https://git.kernel.org/stable/c/5e7338f4dd92b2f8915a82abfa1dd3ad3464bea0
Patch
https://git.kernel.org/stable/c/05e0bb8c3c4dde3e21b9c1cf9395afb04e8b24db
Patch
https://git.kernel.org/stable/c/348620464a5c127399ac09b266f494f393661952
Patch
https://git.kernel.org/stable/c/64ca7f50ad96c2c65ae390b954925a36eabe04aa
Patch
https://git.kernel.org/stable/c/1d6a246cf97c380f2da76591f03019dd9c9599c3
Patch
https://git.kernel.org/stable/c/b0d4af0a4763ddc02344789ef2a281c494bc330d
Patch
https://git.kernel.org/stable/c/ffb2759df7efbc00187bfd9d1072434a13a54139
Patch