CVE-2021-47583

In the Linux kernel, the following vulnerability has been resolved: media: mxl111sf: change mutex_init() location Syzbot reported, that mxl111sf_ctrl_msg() uses uninitialized mutex. The problem was in wrong mutex_init() location. Previous mutex_init(&state->msg_lock) call was in ->init() function, but dvb_usbv2_init() has this order of calls: dvb_usbv2_init() dvb_usbv2_adapter_init() dvb_usbv2_adapter_frontend_init() props->frontend_attach() props->init() Since mxl111sf_* devices call mxl111sf_ctrl_msg() in ->frontend_attach() internally we need to initialize state->msg_lock before frontend_attach(). To achieve it, ->probe() call added to all mxl111sf_* devices, which will simply initiaize mutex.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/44870a9e7a3c24acbb3f888b2a7cc22c9bdf7e7f	Patch
https://git.kernel.org/stable/c/4b2d9600b31f9ba7adbc9f3c54a068615d27b390	Patch
https://git.kernel.org/stable/c/8c6fdf62bfe1bc72bfceeaf832ef7499c7ed09ba	Patch
https://git.kernel.org/stable/c/96f182c9f48b984447741f054ec301fdc8517035	Patch
https://git.kernel.org/stable/c/b99bdf127af91d53919e96292c05f737c45ea59a	Patch
https://git.kernel.org/stable/c/44870a9e7a3c24acbb3f888b2a7cc22c9bdf7e7f	Patch
https://git.kernel.org/stable/c/4b2d9600b31f9ba7adbc9f3c54a068615d27b390	Patch
https://git.kernel.org/stable/c/8c6fdf62bfe1bc72bfceeaf832ef7499c7ed09ba	Patch
https://git.kernel.org/stable/c/96f182c9f48b984447741f054ec301fdc8517035	Patch
https://git.kernel.org/stable/c/b99bdf127af91d53919e96292c05f737c45ea59a	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2024-06-19 15:15

Updated : 2024-11-21 06:36

NVD link : CVE-2021-47583

Mitre link : CVE-2021-47583

CVE.ORG link : CVE-2021-47583

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-908

Use of Uninitialized Resource

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