CVE-2026-46268

The CVE relates to the Linux kernel PCI/P2PDMA subsystem. A warning in p2pmem_alloc_mmap() was triggered by an assertion VM_WARN_ON_ONCE_PAGE(!page_ref_count(page)) after the initial page refcount was changed to zero by a prior patch. The issue arises only when CONFIG_DEBUG_VM is enabled, produci...