{"id":"CVE-2026-80686","summary":"mm: migrate_device: fix pte_pfn/pte_dirty called on non-present PTE","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm: migrate_device: fix pte_pfn/pte_dirty called on non-present PTE\n\npte_pfn() and pte_dirty() have undefined behaviour when called on a\nnon-present PTE. In migrate_vma_collect_pmd(), these functions may be\ninvoked on non-present entries (e.g., device-private entries), leading\nto potential crashes from pte_pfn() or incorrect dirty folio accounting\nfrom pte_dirty(). Fix both by guarding with pte_present() checks.","modified":"2026-08-30T03:48:21.102655571Z","published":"2026-08-28T06:52:51.924Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80686.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/26f9ca8ed42cba25d2c75daff13561cce6019395"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2be94d6b20789b8865b1864dae5fe458ca85e019"},{"type":"WEB","url":"https://git.kernel.org/stable/c/42f30fa5481a1f90571ccdfbb20d2e25e47ae76e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5b948706f11a950bc73c5304630d0a7eafc40daf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/63867c82d0c0c2d182016a32b1cc0103116b0ea5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/86d55447de3738620b9a8272ff167ce97e7f7203"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80686.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80686"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6c287605fd56466e645693eff3ae7c08fba56e0a"},{"fixed":"26f9ca8ed42cba25d2c75daff13561cce6019395"},{"fixed":"5b948706f11a950bc73c5304630d0a7eafc40daf"},{"fixed":"86d55447de3738620b9a8272ff167ce97e7f7203"},{"fixed":"2be94d6b20789b8865b1864dae5fe458ca85e019"},{"fixed":"42f30fa5481a1f90571ccdfbb20d2e25e47ae76e"},{"fixed":"63867c82d0c0c2d182016a32b1cc0103116b0ea5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80686.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.19.0"},{"fixed":"6.1.184"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.153"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.103"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.44"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80686.json"}}],"schema_version":"1.9.0"}