CVE-2026-80686
N/A
N/A
Summary
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
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 6c287605fd56466e645693eff3ae7c08fba56e0a < 26f9ca8ed42cba25d2c75daff13561cce6019395 | affected |
| Linux | Linux | 6c287605fd56466e645693eff3ae7c08fba56e0a < 5b948706f11a950bc73c5304630d0a7eafc40daf | affected |
| Linux | Linux | 6c287605fd56466e645693eff3ae7c08fba56e0a < 86d55447de3738620b9a8272ff167ce97e7f7203 | affected |
| Linux | Linux | 6c287605fd56466e645693eff3ae7c08fba56e0a < 2be94d6b20789b8865b1864dae5fe458ca85e019 | affected |
| Linux | Linux | 6c287605fd56466e645693eff3ae7c08fba56e0a < 42f30fa5481a1f90571ccdfbb20d2e25e47ae76e | affected |
| Linux | Linux | 6c287605fd56466e645693eff3ae7c08fba56e0a < 63867c82d0c0c2d182016a32b1cc0103116b0ea5 | affected |
| Linux | Linux | 5.19 | affected |
| Linux | Linux | 0 < 5.19 | unaffected |
| Linux | Linux | 6.1.184 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.153 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.103 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.44 <= 6.18.* | unaffected |
| Linux | Linux | 7.1.8 <= 7.1.* | unaffected |
| Linux | Linux | 7.2 <= * | unaffected |
Weaknesses
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
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