CVE-2026-72180

A flaw was found in the Linux kernel's huge memory management mm/hugememory. When a device-private Page Middle Directory PMD is downgraded, the pmdswpuffdwp bit, which indicates Userfault File Descriptor Write Protect UFFDWP, is not properly preserved. This oversight allows a local attacker to...

CVE-2026-72180

CVE-2026-72180 affects the Linux kernel’s huge memory handling (mm/huge_memory). The root cause is that during device-private PMD downgrade, the pmd_swp_uffd_wp flag can be lost when the swap entry is rewritten, allowing a plain mprotect() on a UFFD_WP-marked device-private THP to strip the flag ...