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.
Affected versions
Linux kernel versions
5.19
and later are affected. Fixed in
6.1.184,
6.6.153,
6.12.103,
6.18.44,
7.1.8,
7.2
and their respective stable series.
References
6 totalFrequently asked questions
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What is CVE-2026-80686?
CVE-2026-80686 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.19 onward and has been patched in 6.1.184, 6.6.153, 6.12.103 and others. CVE-2026-80686 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-80686?
Yes. CVE-2026-80686 has been patched. Fixed versions include 6.1.184, 6.6.153, 6.12.103 and others. If you are running Linux kernel 5.19 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-80686 actively exploited?
No. CVE-2026-80686 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.