CVE-2021-47583 (GCVE-0-2021-47583)

Vulnerability from cvelistv5 – Published: 2024-06-19 14:53 – Updated: 2025-05-04 07:14
VLAI?
Title
media: mxl111sf: change mutex_init() location
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8572211842afc53c8450fb470f2b8d02ba7592e0 , < 4b2d9600b31f9ba7adbc9f3c54a068615d27b390 (git)
Affected: 8572211842afc53c8450fb470f2b8d02ba7592e0 , < 96f182c9f48b984447741f054ec301fdc8517035 (git)
Affected: 8572211842afc53c8450fb470f2b8d02ba7592e0 , < b99bdf127af91d53919e96292c05f737c45ea59a (git)
Affected: 8572211842afc53c8450fb470f2b8d02ba7592e0 , < 8c6fdf62bfe1bc72bfceeaf832ef7499c7ed09ba (git)
Affected: 8572211842afc53c8450fb470f2b8d02ba7592e0 , < 44870a9e7a3c24acbb3f888b2a7cc22c9bdf7e7f (git)
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    Linux Linux Affected: 3.7
Unaffected: 0 , < 3.7 (semver)
Unaffected: 4.19.222 , ≤ 4.19.* (semver)
Unaffected: 5.4.168 , ≤ 5.4.* (semver)
Unaffected: 5.10.88 , ≤ 5.10.* (semver)
Unaffected: 5.15.11 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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