What is CVE-2021-47405?

CVE-2021-47405 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 2.6.28 onward and patched in 4.4.286, 4.9.285, 4.14.249 and others. CVE-2021-47405 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47405?

CVE-2021-47405 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-2021-47405?

Yes, CVE-2021-47405 has been patched. Fixed versions include 4.4.286, 4.9.285, 4.14.249 and others. If you are running Linux kernel 2.6.28 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47405 actively exploited?

CVE-2021-47405 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-2021-47405

Medium

In the Linux kernel, the following vulnerability has been resolved: HID: usbhid: free raw_report buffers in usbhid_stop Free the unsent raw_report buffers when the device is removed. Fixes a memory leak reported by syzbot at: https://syzkaller.appspot.com/bug?id=7b4fa7cb1a7c2d3342a2a8a6c53371c8c418ab47

Package Linux Kernel

Published 2024-05-21

Last modified 2025-02-03

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-2021-47405 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 2.6.28 and later are affected. Fixed in 4.4.286, 4.9.285, 4.14.249, 4.19.209, 5.4.151, 5.10.71, 5.14.10, 5.15 and their respective stable series.

Affected from

≥ 2.6.28

Fixed in

✓ 4.4.286 4.4.x ✓ 4.9.285 4.9.x ✓ 4.14.249 4.14.x ✓ 4.19.209 4.19.x ✓ 5.4.151 5.4.x ✓ 5.10.71 5.10.x ✓ 5.14.10 5.14.x ✓ 5.15

References

8 total

Kernel Git
https://git.kernel.org/stable/c/2b704864c92dcec2b295f276fcfbfb81d9831f81

Patch
Kernel Git
https://git.kernel.org/stable/c/764ac04de056801dfe52a716da63f6e7018e7f3b

Patch
Kernel Git
https://git.kernel.org/stable/c/7ce4e49146612261265671b1d30d117139021030

Patch
Kernel Git
https://git.kernel.org/stable/c/965147067fa1bedff3ae1f07ce3f89f1a14d2df3

Patch
Kernel Git
https://git.kernel.org/stable/c/c3156fea4d8a0e643625dff69a0421e872d1fdae

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2021-47405

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2025-02-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47405?

CVE-2021-47405 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 2.6.28 onward and has been patched in 4.4.286, 4.9.285, 4.14.249 and others. CVE-2021-47405 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47405?

CVE-2021-47405 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-2021-47405?

Yes. CVE-2021-47405 has been patched. Fixed versions include 4.4.286, 4.9.285, 4.14.249 and others. If you are running Linux kernel 2.6.28 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47405 actively exploited?

No. CVE-2021-47405 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.