CVE-2026-80686
mm: migrate_device: fix pte_pfn/pte_dirty called on non-present PTE
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: mm: migrate_device: fix pte_pfn/pte_dirty called on non-present PTE pte_pfn() and pte_dirty() have undefined behaviour when called on a non-present PTE. In migrate_vma_collect_pmd(), these functions may be invoked on non-present entries (e.g., device-private entries), leading to potential crashes from pte_pfn() or incorrect dirty folio accounting from pte_dirty(). Fix both by guarding with pte_present() checks.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 28, 2026 |
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Affected Versions
Linux / Linux
6c287605fd56466e645693eff3ae7c08fba56e0a < 26f9ca8ed42cba25d2c75daff13561cce6019395 6c287605fd56466e645693eff3ae7c08fba56e0a < 5b948706f11a950bc73c5304630d0a7eafc40daf 6c287605fd56466e645693eff3ae7c08fba56e0a < 86d55447de3738620b9a8272ff167ce97e7f7203 6c287605fd56466e645693eff3ae7c08fba56e0a < 2be94d6b20789b8865b1864dae5fe458ca85e019 6c287605fd56466e645693eff3ae7c08fba56e0a < 42f30fa5481a1f90571ccdfbb20d2e25e47ae76e 6c287605fd56466e645693eff3ae7c08fba56e0a < 63867c82d0c0c2d182016a32b1cc0103116b0ea5
Linux / Linux
5.19
References
git.kernel.org: https://git.kernel.org/stable/c/26f9ca8ed42cba25d2c75daff13561cce6019395 git.kernel.org: https://git.kernel.org/stable/c/5b948706f11a950bc73c5304630d0a7eafc40daf git.kernel.org: https://git.kernel.org/stable/c/86d55447de3738620b9a8272ff167ce97e7f7203 git.kernel.org: https://git.kernel.org/stable/c/2be94d6b20789b8865b1864dae5fe458ca85e019 git.kernel.org: https://git.kernel.org/stable/c/42f30fa5481a1f90571ccdfbb20d2e25e47ae76e git.kernel.org: https://git.kernel.org/stable/c/63867c82d0c0c2d182016a32b1cc0103116b0ea5