Vulnerability Description
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.
References
- https://git.kernel.org/stable/c/2611f7521c6c124b1bef1be4fc319e0ca144502f
- https://git.kernel.org/stable/c/f7e2c21bd1f57cd5350eecdfdb5d6025ca6afbab
FAQ
What is CVE-2026-72180?
CVE-2026-72180 is a documented vulnerability. 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-...
How severe is CVE-2026-72180?
CVSS scoring is not yet available for CVE-2026-72180. Check NVD for updates.
Is there a patch for CVE-2026-72180?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.