What is CVE-2021-47495?

CVE-2021-47495 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Divide By Zero flaw (CWE-369). CVE-2021-47495 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47495?

CVE-2021-47495 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-2021-47495?

No patch is currently available for CVE-2021-47495. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-47495 actively exploited?

CVE-2021-47495 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Divide By Zero (CWE-369)?

The product divides a value by zero, causing a crash or unexpected behaviour. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/369.html

CVE-2021-47495

Medium

In the Linux kernel, the following vulnerability has been resolved: usbnet: sanity check for maxpacket maxpacket of 0 makes no sense and oopses as we need to divide by it. Give up. V2: fixed typo in log and stylistic issues

Package Linux Kernel

Published 2024-05-22

Last modified 2025-09-29

CVSS version 3.1

Patch available

Awaiting data

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-369

CVE-2021-47495 is a Divide By Zero vulnerability

What is Divide By Zero?

The product divides a value by zero, causing a crash or unexpected behaviour. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-47495 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/002d82227c0abe29118cf80f7e2f396b22d448ed
Patch
Kernel patch commit
https://git.kernel.org/stable/c/397430b50a363d8b7bdda00522123f82df6adc5e
Patch
Kernel patch commit
https://git.kernel.org/stable/c/492140e45d2bf27c1014243f8616a9b612144e20
Patch

8 patch commits total View all on NVD

Details

CVE ID CVE-2021-47495

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-22

Modified 2025-09-29

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-47495?

CVE-2021-47495 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Divide By Zero flaw (CWE-369) . CVE-2021-47495 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47495?

CVE-2021-47495 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-2021-47495?

No patch is currently available for CVE-2021-47495. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-47495 actively exploited?

No — CVE-2021-47495 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Divide By Zero (CWE-369)?

The product divides a value by zero, causing a crash or unexpected behaviour. View CWE-369 on MITRE CWE →