CVE-2026-80686

mm: migrate_device: fix pte_pfn/pte_dirty called on non-present PTE

State: Published
Severity: Not scored
Published: Aug 28, 2026
Updated: Aug 28, 2026
Reserved: Aug 26, 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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	6c287605fd56466e645693eff3ae7c08fba56e0a to before 26f9ca8ed42cba25d2c75daff13561cce6019395Affected 6c287605fd56466e645693eff3ae7c08fba56e0a to before 5b948706f11a950bc73c5304630d0a7eafc40dafAffected 6c287605fd56466e645693eff3ae7c08fba56e0a to before 86d55447de3738620b9a8272ff167ce97e7f7203Affected 6c287605fd56466e645693eff3ae7c08fba56e0a to before 2be94d6b20789b8865b1864dae5fe458ca85e019Affected 6c287605fd56466e645693eff3ae7c08fba56e0a to before 42f30fa5481a1f90571ccdfbb20d2e25e47ae76eAffected 6c287605fd56466e645693eff3ae7c08fba56e0a to before 63867c82d0c0c2d182016a32b1cc0103116b0ea5Affected
LinuxLinux	5.19Affected before 5.19Not affected 6.1.184 through 6.1.Not affected 6.6.153 through 6.6.Not affected 6.12.103 through 6.12.Not affected 6.18.44 through 6.18.Not affected 7.1.8 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

6c287605fd56466e645693eff3ae7c08fba56e0a to before 26f9ca8ed42cba25d2c75daff13561cce6019395Affected
6c287605fd56466e645693eff3ae7c08fba56e0a to before 5b948706f11a950bc73c5304630d0a7eafc40dafAffected
6c287605fd56466e645693eff3ae7c08fba56e0a to before 86d55447de3738620b9a8272ff167ce97e7f7203Affected
6c287605fd56466e645693eff3ae7c08fba56e0a to before 2be94d6b20789b8865b1864dae5fe458ca85e019Affected
6c287605fd56466e645693eff3ae7c08fba56e0a to before 42f30fa5481a1f90571ccdfbb20d2e25e47ae76eAffected
6c287605fd56466e645693eff3ae7c08fba56e0a to before 63867c82d0c0c2d182016a32b1cc0103116b0ea5Affected

LinuxLinux

5.19Affected
before 5.19Not affected
6.1.184 through 6.1.*Not affected
6.6.153 through 6.6.*Not affected
6.12.103 through 6.12.*Not affected
6.18.44 through 6.18.*Not affected
7.1.8 through 7.1.*Not affected
7.2 and laterNot affected

References

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