CVE-2026-80686
Last modified
CVE-2026-80686 is a vulnerability of currently unknown severity. 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().
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.
Affected Software
Source: CNA advisory (CVE.org). 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
Timeline
- Published
- Last Modified
- Status
- Received
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