CVE-2022-50229

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

Severity Score

7.1

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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().

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().

This update provides the initial livepatch for this kernel update. This update does not contain any fixes and will be updated with livepatches later.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2025-06-18 CVE Reserved
2025-06-18 CVE Published
2025-06-18 CVE Updated
2025-07-20 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (10)

URL	Tag	Source
https://git.kernel.org/stable/c/b47a22290d581277be70e8a597824a4985d39e83	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/a718eba7e458e2f40531be3c6b6a0028ca7fcace	2022-08-25
https://git.kernel.org/stable/c/4fc41f7ebb7efca282f1740ea934d16f33c1d109	2022-08-25
https://git.kernel.org/stable/c/5e7338f4dd92b2f8915a82abfa1dd3ad3464bea0	2022-08-25
https://git.kernel.org/stable/c/05e0bb8c3c4dde3e21b9c1cf9395afb04e8b24db	2022-08-25
https://git.kernel.org/stable/c/348620464a5c127399ac09b266f494f393661952	2022-08-21
https://git.kernel.org/stable/c/64ca7f50ad96c2c65ae390b954925a36eabe04aa	2022-08-17
https://git.kernel.org/stable/c/1d6a246cf97c380f2da76591f03019dd9c9599c3	2022-08-17
https://git.kernel.org/stable/c/b0d4af0a4763ddc02344789ef2a281c494bc330d	2022-08-17
https://git.kernel.org/stable/c/ffb2759df7efbc00187bfd9d1072434a13a54139	2022-07-15

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 4.9.326 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 4.9.326"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 4.14.291 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 4.14.291"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 4.19.256 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 4.19.256"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 5.4.211 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 5.4.211"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 5.10.137 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 5.10.137"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 5.15.61 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 5.15.61"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 5.18.18 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 5.18.18"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 5.19.2 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 5.19.2"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 6.0 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 6.0"		en		Affected