CVE-2026-46268

CVE-2026-46268 details a Linux kernel issue in PCI/P2PDMA: p2pmem_alloc_mmap() used VM_WARN_ON_ONCE_PAGE(!page_ref_count(page)) after p2pdma page refcount was changed from 1 to 0. The fix changes the assertion to use page_ref_count(page) instead of !page_ref_count(page). The warning is surfaced w...