💣Exploit CVE-2024-36000 - In the Linux kernel, the following vulnerability h

[Maksim]

CVE ID : CVE-2024-36000
Published : May 20, 2024, 10:15 a.m. | 40 minutes ago
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.
Severity: 0.0 | NA
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