What is CVE-2021-47442?

CVE-2021-47442 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Memory Leak flaw (CWE-401), affecting Linux kernel versions from 3.13 onward and patched in 4.4.290, 4.9.288, 4.14.252 and others. CVE-2021-47442 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47442?

CVE-2021-47442 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-47442?

Yes, CVE-2021-47442 has been patched. Fixed versions include 4.4.290, 4.9.288, 4.14.252 and others. If you are running Linux kernel 3.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47442 actively exploited?

CVE-2021-47442 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Memory Leak (CWE-401)?

The product does not release memory after use, causing gradual resource exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/401.html

CVE-2021-47442

Medium

In the Linux kernel, the following vulnerability has been resolved: NFC: digital: fix possible memory leak in digital_in_send_sdd_req() 'skb' is allocated in digital_in_send_sdd_req(), but not free when digital_in_send_cmd() failed, which will cause memory leak. Fix it by freeing 'skb' if digital_in_send_cmd() return failed.

Package Linux Kernel

Published 2024-05-22

Last modified 2025-01-07

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-401

CVE-2021-47442 is a Memory Leak vulnerability

What is Memory Leak?

The product does not release memory after use, causing gradual resource exhaustion. Learn more on MITRE CWE

Affected versions

Linux kernel versions 3.13 and later are affected. Fixed in 4.4.290, 4.9.288, 4.14.252, 4.19.213, 5.4.155, 5.10.75, 5.14.14, 5.15 and their respective stable series.

Affected from

≥ 3.13

Fixed in

✓ 4.4.290 4.4.x ✓ 4.9.288 4.9.x ✓ 4.14.252 4.14.x ✓ 4.19.213 4.19.x ✓ 5.4.155 5.4.x ✓ 5.10.75 5.10.x ✓ 5.14.14 5.14.x ✓ 5.15

References

8 total

Kernel Git
https://git.kernel.org/stable/c/071bdef36391958c89af5fa2172f691b31baa212

Patch
Kernel Git
https://git.kernel.org/stable/c/291c932fc3692e4d211a445ba8aa35663831bac7

Patch
Kernel Git
https://git.kernel.org/stable/c/2bde4aca56db9fe25405d39ddb062531493a65db

Patch
Kernel Git
https://git.kernel.org/stable/c/50cb95487c265187289810addec5093d4fed8329

Patch
Kernel Git
https://git.kernel.org/stable/c/6432d7f1d1c3aa74cfe8f5e3afdf81b786c32e86

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2021-47442

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-22

Modified 2025-01-07

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47442?

CVE-2021-47442 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Memory Leak flaw (CWE-401) . It affects Linux kernel versions from 3.13 onward and has been patched in 4.4.290, 4.9.288, 4.14.252 and others. CVE-2021-47442 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47442?

CVE-2021-47442 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-47442?

Yes. CVE-2021-47442 has been patched. Fixed versions include 4.4.290, 4.9.288, 4.14.252 and others. If you are running Linux kernel 3.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47442 actively exploited?

No. CVE-2021-47442 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.