CVE-2026-80686 is a vulnerability in Linux Kernel
Published on August 28, 2026
mm: migrate_device: fix pte_pfn/pte_dirty called on non-present PTE
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.
Products Associated with CVE-2026-80686
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Affected Versions
Linux:- Version 6c287605fd56466e645693eff3ae7c08fba56e0a and below 26f9ca8ed42cba25d2c75daff13561cce6019395 is affected.
- Version 6c287605fd56466e645693eff3ae7c08fba56e0a and below 5b948706f11a950bc73c5304630d0a7eafc40daf is affected.
- Version 6c287605fd56466e645693eff3ae7c08fba56e0a and below 86d55447de3738620b9a8272ff167ce97e7f7203 is affected.
- Version 6c287605fd56466e645693eff3ae7c08fba56e0a and below 2be94d6b20789b8865b1864dae5fe458ca85e019 is affected.
- Version 6c287605fd56466e645693eff3ae7c08fba56e0a and below 42f30fa5481a1f90571ccdfbb20d2e25e47ae76e is affected.
- Version 6c287605fd56466e645693eff3ae7c08fba56e0a and below 63867c82d0c0c2d182016a32b1cc0103116b0ea5 is affected.
- Version 5.19 is affected.
- Before 5.19 is unaffected.
- Version 6.1.184, <= 6.1.* is unaffected.
- Version 6.6.153, <= 6.6.* is unaffected.
- Version 6.12.103, <= 6.12.* is unaffected.
- Version 6.18.44, <= 6.18.* is unaffected.
- Version 7.1.8, <= 7.1.* is unaffected.
- Version 7.2, <= * is unaffected.