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CVE-2024-27431

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: cpumap: Zero-initialise xdp_rxq_info struct before running XDP program When running an XDP program that is attached to a cpumap…

Published May 17, 2024CWE-908EPSS 0.23%

Overview

CVE-2024-27431 is a high-severity vulnerability. It was published on May 17, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, 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:

cpumap: Zero-initialise xdp_rxq_info struct before running XDP program

When running an XDP program that is attached to a cpumap entry, we don't

initialise the xdp_rxq_info data structure being used in the xdp_buff

that backs the XDP program invocation. Tobias noticed that this leads to

random values being returned as the xdp_md->rx_queue_index value for XDP

programs running in a cpumap.

This means we're basically returning the contents of the uninitialised

memory, which is bad. Fix this by zero-initialising the rxq data

structure before running the XDP program.

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/2487007aa3b9fafbd2cb14068f49791ce1d7ede5Refgit.kernel.org/stable/c/3420b3ff1ff489c177ea1cb7bd9fbbc4e9a0be95Refgit.kernel.org/stable/c/5f4e51abfbe6eb444fa91906a5cd083044278297Refgit.kernel.org/stable/c/eaa7cb836659ced2d9f814ac32aa3ec193803ed6Refgit.kernel.org/stable/c/f0363af9619c77730764f10360e36c6445c12f7bRefgit.kernel.org/stable/c/f562e4c4aab00986dde3093c4be919c3f2b85a4aRefgit.kernel.org/stable/c/2487007aa3b9fafbd2cb14068f49791ce1d7ede5Refgit.kernel.org/stable/c/3420b3ff1ff489c177ea1cb7bd9fbbc4e9a0be95Refgit.kernel.org/stable/c/5f4e51abfbe6eb444fa91906a5cd083044278297Refgit.kernel.org/stable/c/eaa7cb836659ced2d9f814ac32aa3ec193803ed6

How CyberStrike helps

Frequently asked questions

What is CVE-2024-27431?

CVE-2024-27431 is a high-severity vulnerability. It was published on May 17, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-27431?

This vulnerability has a CVSS 3.1 base score of 7.8, 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-2024-27431?

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-2024-27431?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-27431 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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