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CVE-2024-36000

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix missing hugetlb_lock for resv uncharge There is a recent report on UFFDIO_COPY over hugetlb: https://lore.kern…

Published May 20, 2024CWE-617EPSS 0.22%

Overview

CVE-2024-36000 is a medium-severity vulnerability. It was published on May 20, 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:

mm/hugetlb: fix missing hugetlb_lock for resv uncharge

There is a recent report on UFFDIO_COPY over hugetlb:

https://lore.kernel.org/all/[email protected]/

350: lockdep_assert_held(&hugetlb_lock);

Should be an issue in hugetlb but triggered in an userfault context, where

it goes into the unlikely path where two threads modifying the resv map

together. Mike has a fix in that path for resv uncharge but it looks like

the locking criteria was overlooked: hugetlb_cgroup_uncharge_folio_rsvd()

will update the cgroup pointer, so it requires to be called with the lock

held.

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/4c806333efea1000a2a9620926f560ad2e1ca7ccRefgit.kernel.org/stable/c/538faabf31e9c53d8c870d114846fda958a0de10Refgit.kernel.org/stable/c/b76b46902c2d0395488c8412e1116c2486cdfcb2Refgit.kernel.org/stable/c/f6c5d21db16a0910152ec8aa9d5a7aed72694505Refgit.kernel.org/stable/c/4c806333efea1000a2a9620926f560ad2e1ca7ccRefgit.kernel.org/stable/c/538faabf31e9c53d8c870d114846fda958a0de10Refgit.kernel.org/stable/c/b76b46902c2d0395488c8412e1116c2486cdfcb2Refgit.kernel.org/stable/c/f6c5d21db16a0910152ec8aa9d5a7aed72694505

How CyberStrike helps

Frequently asked questions

What is CVE-2024-36000?

CVE-2024-36000 is a medium-severity vulnerability. It was published on May 20, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-36000?

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-2024-36000?

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-2024-36000?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-36000 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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