CVE-2024-36000
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:…
Does this matter?
Lower severity and a low EPSS score (0.22%). Track it; it rarely justifies an emergency change on its own.
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/000000000000ee06de0616177560@google.com/ 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 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.22% probability · 13th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-617
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.