CVE-2021-47583
media: mxl111sf: change mutex_init() location
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
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.
Timeline
ID reserved
By Linux
- 26 days later
· 26 days later
Published
- 23 months later
· 23 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.24% · top 85% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected 8572211842afc53c8450fb470f2b8d02ba7592e0 – < 4b2d9600b31f9ba7adbc9f3c54a068615d27b390
- affected 8572211842afc53c8450fb470f2b8d02ba7592e0 – < 96f182c9f48b984447741f054ec301fdc8517035
- affected 8572211842afc53c8450fb470f2b8d02ba7592e0 – < b99bdf127af91d53919e96292c05f737c45ea59a
- affected 8572211842afc53c8450fb470f2b8d02ba7592e0 – < 8c6fdf62bfe1bc72bfceeaf832ef7499c7ed09ba
- affected 8572211842afc53c8450fb470f2b8d02ba7592e0 – < 44870a9e7a3c24acbb3f888b2a7cc22c9bdf7e7f
- affected 3.7
- unaffected < 3.7
- unaffected 4.19.222 – ≤ 4.19.*
- unaffected 5.4.168 – ≤ 5.4.*
- unaffected 5.10.88 – ≤ 5.10.*
- unaffected 5.15.11 – ≤ 5.15.*
- unaffected 5.16 – ≤ *
References (5)
- https://git.kernel.org/stable/c/4b2d9600b31f9ba7adbc9f3c54a068615d27b390 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/96f182c9f48b984447741f054ec301fdc8517035 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/b99bdf127af91d53919e96292c05f737c45ea59a (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/8c6fdf62bfe1bc72bfceeaf832ef7499c7ed09ba (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/44870a9e7a3c24acbb3f888b2a7cc22c9bdf7e7f (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-47583)Record last updated .