CVE-2026-80686
Published Aug 28, 2026
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.
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EPSS — Exploit Prediction
0.0017
Probability of exploitation
0.07%
Percentile rank
EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.
References
Other 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
Frequently Asked Questions
What is CVE-2026-80686? +
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.
How do I check if I'm vulnerable to CVE-2026-80686? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.