cve-2024-47676
Vulnerability from cvelistv5
Published
2024-10-21 11:53
Modified
2024-12-19 09:25
Severity ?
EPSS score ?
0.04% (0.09775)
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb.c: fix UAF of vma in hugetlb fault pathway Syzbot reports a UAF in hugetlb_fault(). This happens because vmf_anon_prepare() could drop the per-VMA lock and allow the current VMA to be freed before hugetlb_vma_unlock_read() is called. We can fix this by using a modified version of vmf_anon_prepare() that doesn't release the VMA lock on failure, and then release it ourselves after hugetlb_vma_unlock_read().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/98b74bb4d7e96b4da5ef3126511febe55b76b807Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d59ebc99dee0a2687a26df94b901eb8216dbf876Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e897d184a8dd4a4e1f39c8c495598e4d9472776cPatch
Impacted products
Vendor Product Version
Linux Linux Version: 9acad7ba3e25d11f4c96df1b7312ae89e6faca5c
Version: 9acad7ba3e25d11f4c96df1b7312ae89e6faca5c
Version: 9acad7ba3e25d11f4c96df1b7312ae89e6faca5c
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   Linux Linux Version: 6.9
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