Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.9.7, < 5.10 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/4c806333efea1000a2a9620926f560ad2e1ca7ccPatch
- https://git.kernel.org/stable/c/538faabf31e9c53d8c870d114846fda958a0de10Patch
- https://git.kernel.org/stable/c/b76b46902c2d0395488c8412e1116c2486cdfcb2Patch
- https://git.kernel.org/stable/c/f6c5d21db16a0910152ec8aa9d5a7aed72694505Patch
- https://git.kernel.org/stable/c/4c806333efea1000a2a9620926f560ad2e1ca7ccPatch
- https://git.kernel.org/stable/c/538faabf31e9c53d8c870d114846fda958a0de10Patch
- https://git.kernel.org/stable/c/b76b46902c2d0395488c8412e1116c2486cdfcb2Patch
- https://git.kernel.org/stable/c/f6c5d21db16a0910152ec8aa9d5a7aed72694505Patch
FAQ
What is CVE-2024-36000?
CVE-2024-36000 is a vulnerability with a CVSS score of 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.kernel....
How severe is CVE-2024-36000?
CVE-2024-36000 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-36000?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.