{"id":"CVE-2026-80686","state":"PUBLISHED","title":"mm: migrate_device: fix pte_pfn/pte_dirty called on non-present PTE","description":"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.","publishedAt":"2026-08-28T06:52:51.924Z","updatedAt":"2026-08-28T06:52:51.924Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6c287605fd56466e645693eff3ae7c08fba56e0a","status":"affected","lessThan":"26f9ca8ed42cba25d2c75daff13561cce6019395","versionType":"git"},{"version":"6c287605fd56466e645693eff3ae7c08fba56e0a","status":"affected","lessThan":"5b948706f11a950bc73c5304630d0a7eafc40daf","versionType":"git"},{"version":"6c287605fd56466e645693eff3ae7c08fba56e0a","status":"affected","lessThan":"86d55447de3738620b9a8272ff167ce97e7f7203","versionType":"git"},{"version":"6c287605fd56466e645693eff3ae7c08fba56e0a","status":"affected","lessThan":"2be94d6b20789b8865b1864dae5fe458ca85e019","versionType":"git"},{"version":"6c287605fd56466e645693eff3ae7c08fba56e0a","status":"affected","lessThan":"42f30fa5481a1f90571ccdfbb20d2e25e47ae76e","versionType":"git"},{"version":"6c287605fd56466e645693eff3ae7c08fba56e0a","status":"affected","lessThan":"63867c82d0c0c2d182016a32b1cc0103116b0ea5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/migrate_device.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.19","versionType":"semver"},{"version":"6.1.184","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.153","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.103","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/migrate_device.c"]}],"references":["https://git.kernel.org/stable/c/26f9ca8ed42cba25d2c75daff13561cce6019395","https://git.kernel.org/stable/c/5b948706f11a950bc73c5304630d0a7eafc40daf","https://git.kernel.org/stable/c/86d55447de3738620b9a8272ff167ce97e7f7203","https://git.kernel.org/stable/c/2be94d6b20789b8865b1864dae5fe458ca85e019","https://git.kernel.org/stable/c/42f30fa5481a1f90571ccdfbb20d2e25e47ae76e","https://git.kernel.org/stable/c/63867c82d0c0c2d182016a32b1cc0103116b0ea5"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80686.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80686","state":"PUBLISHED","datePublished":"2026-08-28T06:52:51.924Z","dateUpdated":"2026-08-28T06:52:51.924Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.784Z"},"containers":{"cna":{"title":"mm: migrate_device: fix pte_pfn/pte_dirty called on non-present PTE","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6c287605fd56466e645693eff3ae7c08fba56e0a","status":"affected","lessThan":"26f9ca8ed42cba25d2c75daff13561cce6019395","versionType":"git"},{"version":"6c287605fd56466e645693eff3ae7c08fba56e0a","status":"affected","lessThan":"5b948706f11a950bc73c5304630d0a7eafc40daf","versionType":"git"},{"version":"6c287605fd56466e645693eff3ae7c08fba56e0a","status":"affected","lessThan":"86d55447de3738620b9a8272ff167ce97e7f7203","versionType":"git"},{"version":"6c287605fd56466e645693eff3ae7c08fba56e0a","status":"affected","lessThan":"2be94d6b20789b8865b1864dae5fe458ca85e019","versionType":"git"},{"version":"6c287605fd56466e645693eff3ae7c08fba56e0a","status":"affected","lessThan":"42f30fa5481a1f90571ccdfbb20d2e25e47ae76e","versionType":"git"},{"version":"6c287605fd56466e645693eff3ae7c08fba56e0a","status":"affected","lessThan":"63867c82d0c0c2d182016a32b1cc0103116b0ea5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/migrate_device.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.19","versionType":"semver"},{"version":"6.1.184","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.153","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.103","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/migrate_device.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/26f9ca8ed42cba25d2c75daff13561cce6019395"},{"url":"https://git.kernel.org/stable/c/5b948706f11a950bc73c5304630d0a7eafc40daf"},{"url":"https://git.kernel.org/stable/c/86d55447de3738620b9a8272ff167ce97e7f7203"},{"url":"https://git.kernel.org/stable/c/2be94d6b20789b8865b1864dae5fe458ca85e019"},{"url":"https://git.kernel.org/stable/c/42f30fa5481a1f90571ccdfbb20d2e25e47ae76e"},{"url":"https://git.kernel.org/stable/c/63867c82d0c0c2d182016a32b1cc0103116b0ea5"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-28T06:52:51.924Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.1.184"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.6.153"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.12.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.18.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"7.1.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}