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CVE-2024-56721

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Terminate the erratum_1386_microcode array The erratum_1386_microcode array requires an empty entry at the end.

Published Dec 29, 2024CWE-125EPSS 0.23%

Overview

CVE-2024-56721 is a high-severity vulnerability. It was published on December 29, 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:

x86/CPU/AMD: Terminate the erratum_1386_microcode array

The erratum_1386_microcode array requires an empty entry at the end.

Otherwise x86_match_cpu_with_stepping() will continue iterate the array after

it ended.

Add an empty entry to erratum_1386_microcode to its end.

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/82d6b82cf89d950982ac240ba068c3a7e1f23b0aRefgit.kernel.org/stable/c/ccfee14f08b8699132b87bc6d78e0fa75bf094ddRefgit.kernel.org/stable/c/ff6cdc407f4179748f4673c39b0921503199a0ad

How CyberStrike helps

Frequently asked questions

What is CVE-2024-56721?

CVE-2024-56721 is a high-severity vulnerability. It was published on December 29, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2024-56721?

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-2024-56721?

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-2024-56721?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-56721 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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