{"apiVersion":"1.0","identifier":"CVE-2026-74716","description":"In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Fix locally exploitable BUG_ON in amdxdna_insert_pages() In amdxdna_insert_pages(), vm_flags_mod() sets VM_MIXEDMAP and clears VM_PFNMAP. If an unprivileged userspace process mmaps a non-imported GEM object and then calls madvise(MADV_DONTNEED), the PTEs will be successfully cleared because VM_MIXEDMAP allows this (unlike VM_PFNMAP). When userspace subsequently accesses the memory, drm_gem_shmem_fault() handles the page fault and attempts to map the backing shmem page via vmf_insert_pfn() which calls vmf_insert_pfn_prot(). Because the backing shmem page is normal system memory (pfn_valid(pfn) is true) and the VMA now has VM_MIXEDMAP set, won-t this predictably trigger the explicit assertion BUG_ON((vma->vm_flags & VM_MIXEDMAP) && pfn_valid(pfn)) Fix by removing the vm_flags_mod() call and replacing the vm_insert_pages() pre-population with the handle_mm_fault() loop that was already used for the import (dma-buf) path.","publishedAt":"2026-08-22T16:16:46","lastModifiedAt":"2026-08-22T16:16:46","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74716","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00155,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74716","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74716","en":"https://www.redsauce.net/en/cves/CVE-2026-74716","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74716","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74716","de":"https://www.redsauce.net/de/cves/CVE-2026-74716","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74716","el":"https://www.redsauce.net/el/cves/CVE-2026-74716"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74716"}}