CVE-2025-39754

CVE-2025-39754: vulnerability in Linux

mm/smaps: fix race between smaps_hugetlb_range and migration

Published · Updated

3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 0.1%
exploitation probability
0.1%top 97% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved: mm/smaps: fix race between smaps_hugetlb_range and migration smaps_hugetlb_range() handles the pte without holdling ptl, and may be concurrenct with migration, leaing to BUG_ON in pfn_swap_entry_to_page(). The race is as follows. smaps_hugetlb_range migrate_pages huge_ptep_get remove_migration_ptes folio_unlock pfn_swap_entry_folio BUG_ON To fix it, hold ptl lock in smaps_hugetlb_range().
Affected products
Linux · Linux
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References
https://git.kernel.org/stable/c/09fc018f48871123ad5dbd7b03c956580232ed76https://git.kernel.org/stable/c/2a1f3663974162b8f1e098196f557cfc1d160138https://git.kernel.org/stable/c/37ee0d97298b0547cb26b6957ccfea2d356bd0e7https://git.kernel.org/stable/c/45d19b4b6c2d422771c29b83462d84afcbb33f01https://git.kernel.org/stable/c/b625883ccbcc2b57808db51d1375b1d7b9bcb3e5https://git.kernel.org/stable/c/f76089018b34dbe0c2e9b67c5b7d8860668748bb