5.5

CVE-2021-47583: media: mxl111sf: change mutex_init() location

Modified
AliasesUBUNTU-CVE-2021-47583DEBIAN-CVE-2021-47583
Published 19-06-2024Last modified 11-05-2026

Vulnerability summary

CVE-2021-47583 is a medium (CVSS 5.5) Use of Uninitialized Resource vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 8
SUSE-SU-2024:2362-1SUSE-SU-2024:2365-1SUSE-SU-2024:2372-1SUSE-SU-2024:2384-1SUSE-SU-2024:2394-1SUSE-SU-2024:2902-1

Timeline

  1. 19-06-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.24% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu87 products
  • linuxAll versions (No fix recorded) | < 5.4.0-105.119
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1069.73
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 8572211842afc53c8450fb470f2b8d02ba7592e0, < 4b2d9600b31f9ba7adbc9f3c54a068615d27b390 | ≥ 8572211842afc53c8450fb470f2b8d02ba7592e0, < 96f182c9f48b984447741f054ec301fdc8517035 | ≥ 8572211842afc53c8450fb470f2b8d02ba7592e0, < b99bdf127af91d53919e96292c05f737c45ea59a | ≥ 8572211842afc53c8450fb470f2b8d02ba7592e0, < 8c6fdf62bfe1bc72bfceeaf832ef7499c7ed09ba | ≥ 8572211842afc53c8450fb470f2b8d02ba7592e0, < 44870a9e7a3c24acbb3f888b2a7cc22c9bdf7e7f | 3.7
  • linux_kernel≥ 3.7, < 4.19.222 | ≥ 4.20, < 5.4.168 | ≥ 5.5, < 5.10.88 | ≥ 5.11, < 5.15.11
Debian1 product
  • linux< 5.15.15-1

3 vendors · 90 products

References

9 links