CVE-2024-36000
"Google Linux hugetlb Locklesswalking NULL Pointer Dereference"
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.
INFO
Published Date :
May 20, 2024, 10:15 a.m.
Last Modified :
Nov. 21, 2024, 9:21 a.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
Exploitability Score :
References to Advisories, Solutions, and Tools
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CVE-2024-36000.
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CVE-2024-36000 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-36000 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/4c806333efea1000a2a9620926f560ad2e1ca7cc Added Reference https://git.kernel.org/stable/c/538faabf31e9c53d8c870d114846fda958a0de10 Added Reference https://git.kernel.org/stable/c/b76b46902c2d0395488c8412e1116c2486cdfcb2 Added Reference https://git.kernel.org/stable/c/f6c5d21db16a0910152ec8aa9d5a7aed72694505 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 29, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 20, 2024
Action Type Old Value New Value Added 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. Added Reference kernel.org https://git.kernel.org/stable/c/4c806333efea1000a2a9620926f560ad2e1ca7cc [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/f6c5d21db16a0910152ec8aa9d5a7aed72694505 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/538faabf31e9c53d8c870d114846fda958a0de10 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/b76b46902c2d0395488c8412e1116c2486cdfcb2 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-36000 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-36000
weaknesses.