kernel: mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix hugepmdunshare vs GUP-fast race hugepmdunshare drops a reference on a page table that may have previously been shared across processes, potentially turning it into a normal page table used in another process in...

PT-2025-3608

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.13.0-rc2master+ Description The issue is related to the Linux kernel's handling of huge page tables. The folio refcount may be increased unexpectedly through try get folio by callers such as split huge pages...