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CVE-2024-57881

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: mm/page_alloc: don't call pfn_to_page() on possibly non-existent PFN in split_large_buddy() In split_large_buddy(), we might ca…

Published Jan 11, 2025CWE-476EPSS 0.18%

Overview

CVE-2024-57881 is a medium-severity vulnerability. It was published on January 11, 2025 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:

mm/page_alloc: don't call pfn_to_page() on possibly non-existent PFN in split_large_buddy()

In split_large_buddy(), we might call pfn_to_page() on a PFN that might

not exist. In corner cases, such as when freeing the highest pageblock in

the last memory section, this could result with CONFIG_SPARSEMEM &&

!CONFIG_SPARSEMEM_EXTREME in __pfn_to_section() returning NULL and and

__section_mem_map_addr() dereferencing that NULL pointer.

Let's fix it, and avoid doing a pfn_to_page() call for the first

iteration, where we already have the page.

So far this was found by code inspection, but let's just CC stable as the

fix is easy.

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/4234ca9884bcae9e48ed38652d91696ad5cd591dRefgit.kernel.org/stable/c/faeec8e23c10bd30e8aa759a2eb3018dae00f924

How CyberStrike helps

Frequently asked questions

What is CVE-2024-57881?

CVE-2024-57881 is a medium-severity vulnerability. It was published on January 11, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-57881?

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-2024-57881?

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-2024-57881?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-57881 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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