CVE-2026-72180
mm/huge_memory: preserve pmd_swp_uffd_wp on device-private PMD downgrade
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: mm/huge_memory: preserve pmd_swp_uffd_wp on device-private PMD downgrade change_non_present_huge_pmd() rewrites a writable device-private PMD swap entry into a readable one without carrying pmd_swp_uffd_wp() across. The PTE-level change_softleaf_pte() does this correctly; mirror that here, matching what copy_huge_pmd() does for the fork path. Without the carry, a plain mprotect() over a UFFD_WP-marked device-private THP strips the bit and the trap is bypassed on swap-in.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 15, 2026 |
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Affected Versions
Linux / Linux
368076f52ebeecd33e10a9f80905d7508b6b6149 < 2611f7521c6c124b1bef1be4fc319e0ca144502f 368076f52ebeecd33e10a9f80905d7508b6b6149 < f7e2c21bd1f57cd5350eecdfdb5d6025ca6afbab
Linux / Linux
6.19