Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2021-47604

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: vduse: check that offset is within bounds in get_config() This condition checks "len" but it does not check "offset" and that c…

Published Jun 19, 2024CWE-125EPSS 0.21%

Overview

CVE-2021-47604 is a high-severity vulnerability. It was published on June 19, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

vduse: check that offset is within bounds in get_config()

This condition checks "len" but it does not check "offset" and that

could result in an out of bounds read if "offset > dev->config_size".

The problem is that since both variables are unsigned the

"dev->config_size - offset" subtraction would result in a very high

unsigned value.

I think these checks might not be necessary because "len" and "offset"

are supposed to already have been validated using the

vhost_vdpa_config_validate() function. But I do not know the code

perfectly, and I like to be safe.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/dc1db0060c02d119fd4196924eff2d1129e9a442Refgit.kernel.org/stable/c/ebbbc5fea3f648175df1aa3f127c78eb0252cc2aRefgit.kernel.org/stable/c/dc1db0060c02d119fd4196924eff2d1129e9a442Refgit.kernel.org/stable/c/ebbbc5fea3f648175df1aa3f127c78eb0252cc2a

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47604?

CVE-2021-47604 is a high-severity vulnerability. It was published on June 19, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2021-47604?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-47604?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-47604?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47604 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2021

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999