Description
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.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 6c287605fd56466e645693eff3ae7c08fba56e0a, < 26f9ca8ed42cba25d2c75daff13561cce6019395; >= 6c287605fd56466e645693eff3ae7c08fba56e0a, < 5b948706f11a950bc73c5304630d0a7eafc40daf; >= 6c287605fd56466e645693eff3ae7c08fba56e0a, < 86d55447de3738620b9a8272ff167ce97e7f7203; >= 6c287605fd56466e645693eff3ae7c08fba56e0a, < 2be94d6b20789b8865b1864dae5fe458ca85e019; >= 6c287605fd56466e645693eff3ae7c08fba56e0a, < 42f30fa5481a1f90571ccdfbb20d2e25e47ae76e; >= 6c287605fd56466e645693eff3ae7c08fba56e0a, < 63867c82d0c0c2d182016a32b1cc0103116b0ea5 |
| Linux | Linux | 5.19 |
References
- https://git.kernel.org/stable/c/26f9ca8ed42cba25d2c75daff13561cce6019395
- https://git.kernel.org/stable/c/2be94d6b20789b8865b1864dae5fe458ca85e019
- https://git.kernel.org/stable/c/42f30fa5481a1f90571ccdfbb20d2e25e47ae76e
- https://git.kernel.org/stable/c/5b948706f11a950bc73c5304630d0a7eafc40daf
- https://git.kernel.org/stable/c/63867c82d0c0c2d182016a32b1cc0103116b0ea5
- https://git.kernel.org/stable/c/86d55447de3738620b9a8272ff167ce97e7f7203
Timeline
- Published
- Aug 28, 2026
- Last modified
- Nov 6, 2026
- NVD status
- Received