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Описание
Оригинално описание
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.
Засегнати продукти
- Linux Linux: 6c287605fd56466e645693eff3ae7c08fba56e0a преди 26f9ca8ed42cba25d2c75daff13561cce6019395; 6c287605fd56466e645693eff3ae7c08fba56e0a преди 5b948706f11a950bc73c5304630d0a7eafc40daf; 6c287605fd56466e645693eff3ae7c08fba56e0a преди 86d55447de3738620b9a8272ff167ce97e7f7203; 6c287605fd56466e645693eff3ae7c08fba56e0a преди 2be94d6b20789b8865b1864dae5fe458ca85e019; 6c287605fd56466e645693eff3ae7c08fba56e0a преди 42f30fa5481a1f90571ccdfbb20d2e25e47ae76e; 6c287605fd56466e645693eff3ae7c08fba56e0a преди 63867c82d0c0c2d182016a32b1cc0103116b0ea5
- Linux Linux: 5.19; преди 5.19; 6.1.184 до 6.1.*; 6.6.153 до 6.6.*; 6.12.103 до 6.12.*; 6.18.44 до 6.18.*; 7.1.8 до 7.1.*; 7.2 до *
История
- 28 август 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-80686
- https://nvd.nist.gov/vuln/detail/CVE-2026-80686
- 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