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()…

PriorityP419medium5.5CVSS 3.1

AVLACLPRLUINSUCNINAH

EPSS

0.24%

15.0th percentile

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.

Affected

15 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 5.15.15-1 (bookworm)	linux 5.15.15-1 (bookworm)
linux	linux	—	—
linux	linux	>= 8572211842afc53c8450fb470f2b8d02ba7592e0 < 4b2d9600b31f9ba7adbc9f3c54a068615d27b390	4b2d9600b31f9ba7adbc9f3c54a068615d27b390
linux	linux	>= 8572211842afc53c8450fb470f2b8d02ba7592e0 < 96f182c9f48b984447741f054ec301fdc8517035	96f182c9f48b984447741f054ec301fdc8517035
linux	linux	>= 8572211842afc53c8450fb470f2b8d02ba7592e0 < b99bdf127af91d53919e96292c05f737c45ea59a	b99bdf127af91d53919e96292c05f737c45ea59a
linux	linux	>= 8572211842afc53c8450fb470f2b8d02ba7592e0 < 8c6fdf62bfe1bc72bfceeaf832ef7499c7ed09ba	8c6fdf62bfe1bc72bfceeaf832ef7499c7ed09ba
linux	linux	>= 8572211842afc53c8450fb470f2b8d02ba7592e0 < 44870a9e7a3c24acbb3f888b2a7cc22c9bdf7e7f	44870a9e7a3c24acbb3f888b2a7cc22c9bdf7e7f
linux	linux_kernel	>= 0 < 5.10.92-1	5.10.92-1
linux	linux_kernel	>= 0 < 5.15.15-1	5.15.15-1
linux	linux_kernel	>= 0 < 5.15.15-1	5.15.15-1
linux	linux_kernel	>= 0 < 5.15.15-1	5.15.15-1
linux	linux_kernel	>= 3.7 < 4.19.222	4.19.222
linux	linux_kernel	>= 4.20 < 5.4.168	5.4.168
linux	linux_kernel	>= 5.11 < 5.15.11	5.15.11
linux	linux_kernel	>= 5.5 < 5.10.88	5.10.88

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv5.5MEDIUM

vendor_debian5.5MEDIUM

vendor_redhat5.5MEDIUM

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