CVE-2024-36000
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-36000
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-36000.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2024-36000
- Downstream
- Related
- Published
- 2024-05-20T10:15:14Z
- Modified
- 2025-09-23T18:23:11Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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/000000000000ee06de0616177560@google.com/
350: lockdepassertheld(&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: hugetlbcgroupunchargefoliorsvd() will update the cgroup pointer, so it requires to be called with the lock held.
- References