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CVE-2021-3839

7.5 · HIGH

A flaw was found in the vhost library in DPDK.

Published Aug 23, 2022CWE-125EPSS 1.70%

Overview

CVE-2021-3839 is a high-severity vulnerability. It was published on August 23, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A flaw was found in the vhost library in DPDK. Function vhost_user_set_inflight_fd() does not validate `msg->payload.inflight.num_queues`, possibly causing out-of-bounds memory read/write. Any software using DPDK vhost library may crash as a result of this vulnerability.

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

Refaccess.redhat.com/security/cve/CVE-2021-3839Refbugzilla.redhat.com/show_bug.cgi?id=2025882GitHubgithub.com/DPDK/dpdk/commit/6442c329b9d2ded0f44b27d2016aaba8ba5844c5Refaccess.redhat.com/security/cve/CVE-2021-3839Refbugzilla.redhat.com/show_bug.cgi?id=2025882GitHubgithub.com/DPDK/dpdk/commit/6442c329b9d2ded0f44b27d2016aaba8ba5844c5

How CyberStrike helps

Frequently asked questions

What is CVE-2021-3839?

CVE-2021-3839 is a high-severity vulnerability. It was published on August 23, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2021-3839?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-3839?

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-2021-3839?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-3839 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.

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