CVE-2025-21696

CVE-2025-21696 (Linux kernel) : Affects memory management with userfaultfd (UFFD). When mremap() moves a region previously registered with UFFD_WP but without UFFD_FEATURE_EVENT_REMAP, the code could fail to clear uffd-wp on PTE/PMD, causing a mismatch between vma flags (UFFD_WP cleared) and PTE/...

CVE-2025-21696

In the Linux kernel, the following vulnerability has been resolved: mm: clear uffd-wp PTE/PMD state on mremap When mremaping a memory region previously registered with userfaultfd as write-protected but without UFFDFEATUREEVENTREMAP, an inconsistency in flag clearing leads to a mismatch between t...