CVE-2021-47211

Aliases:UBUNTU-CVE-2021-47211DEBIAN-CVE-2021-47211
Advisory lineage Upstream: 0 Downstream: 27
Modified
Published: 10 Apr 2024, 19:01
Last modified:19 Jun 2026, 11:57

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.24% LOW
0% probability +0.23%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

10 Apr 2024, 19:01
Published
Vulnerability first disclosed
19 Jun 2026, 11:57
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: fix null pointer dereference on pointer cs_desc The pointer cs_desc return from snd_usb_find_clock_source could be null, so there is a potential null pointer dereference issue. Fix this by adding a null check before dereference.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.24%• Percentile: 16%

Techniques & Countermeasures

  • CWE-476•NULL Pointer Dereference

    The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

  • debian•linux

    < 5.10.259-1 | < 5.15.5-1 | < 5.15.5-1 | < 5.15.5-1

  • ubuntu•linux

    all | < 4.4.0-269.303 | < 4.15.0-238.250 | < 5.4.0-218.238

  • ubuntu•linux-allwinner-5.19

    all

  • ubuntu•linux-aws

    < 4.4.0-1144.150 | < 4.4.0-1182.197 | < 4.15.0-1181.194 | < 5.4.0-1147.157

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    all

  • ubuntu•linux-aws-5.13

    all

  • ubuntu•linux-aws-5.19

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1147.157~18.04.1

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-6.2

    all

  • ubuntu•linux-aws-fips

    < 4.15.0-2119.125 | all | < 5.4.0-1147.157+fips1

  • ubuntu•linux-aws-hwe

    < 4.15.0-1181.194~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1189.204~14.04.1 | < 4.15.0-1189.204~16.04.1 | all | < 5.4.0-1152.159

  • ubuntu•linux-azure-4.15

    < 4.15.0-1189.204

  • ubuntu•linux-azure-5.11

    all

  • ubuntu•linux-azure-5.13

    all

  • ubuntu•linux-azure-5.19

    all

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1152.159~18.04.1

  • ubuntu•linux-azure-5.8

    all

  • ubuntu•linux-azure-6.2

    all

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde

    all

  • ubuntu•linux-azure-fde-5.19

    all

  • ubuntu•linux-azure-fde-6.2

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2098.104 | all | < 5.4.0-1153.160+fips1

  • ubuntu•linux-bluefield

    all | < 5.4.0-1106.113

  • ubuntu•linux-fips

    < 4.4.0-1114.121 | all | < 4.15.0-1136.147 | < 5.4.0-1121.131

  • ubuntu•linux-gcp

    < 4.15.0-1174.191~16.04.1 | all | < 5.4.0-1150.159

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1174.191

  • ubuntu•linux-gcp-5.11

    all

  • ubuntu•linux-gcp-5.13

    all

  • ubuntu•linux-gcp-5.19

    all

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1150.159~18.04.1

  • ubuntu•linux-gcp-5.8

    all

  • ubuntu•linux-gcp-6.2

    all

  • ubuntu•linux-gcp-fips

    < 4.15.0-2082.88 | all | < 5.4.0-1150.159+fips1

  • ubuntu•linux-gke

    all

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.15

    all

  • ubuntu•linux-gke-5.4

    all

  • ubuntu•linux-gkeop

    all

  • ubuntu•linux-gkeop-5.4

    all

  • ubuntu•linux-hwe

    < 4.15.0-238.250~16.04.1 | all

  • ubuntu•linux-hwe-5.11

    all

  • ubuntu•linux-hwe-5.13

    all

  • ubuntu•linux-hwe-5.19

    all

Showing first 50 affected entries in server-rendered view.

References (24)