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CVE-2021-47003

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix potential null dereference on pointer status There are calls to idxd_cmd_exec that pass a null status poin…

Published Feb 28, 2024CWE-476EPSS 0.24%

Overview

CVE-2021-47003 is a medium-severity vulnerability. It was published on February 28, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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:

dmaengine: idxd: Fix potential null dereference on pointer status

There are calls to idxd_cmd_exec that pass a null status pointer however

a recent commit has added an assignment to *status that can end up

with a null pointer dereference. The function expects a null status

pointer sometimes as there is a later assignment to *status where

status is first null checked. Fix the issue by null checking status

before making the assignment.

Addresses-Coverity: ("Explicit null dereferenced")

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/2280b4cc29d8cdd2be3d1b2d1ea4f958e2131c97Refgit.kernel.org/stable/c/28ac8e03c43dfc6a703aa420d18222540b801120Refgit.kernel.org/stable/c/5756f757c72501ef1a16f5f63f940623044180e9Refgit.kernel.org/stable/c/7bc402f843e7817a4a808e7b9ab0bcd7ffd55bfaRefgit.kernel.org/stable/c/2280b4cc29d8cdd2be3d1b2d1ea4f958e2131c97Refgit.kernel.org/stable/c/28ac8e03c43dfc6a703aa420d18222540b801120Refgit.kernel.org/stable/c/5756f757c72501ef1a16f5f63f940623044180e9Refgit.kernel.org/stable/c/7bc402f843e7817a4a808e7b9ab0bcd7ffd55bfa

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47003?

CVE-2021-47003 is a medium-severity vulnerability. It was published on February 28, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47003?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-47003?

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-2021-47003?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47003 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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