mm/migrate_device: fix pgtable leak in migrate_vma_insert_huge_pmd_page

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63953
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:14 UTC
Updated2026-07-19 16:17:14 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: mm/migrate_device: fix pgtable leak in migrate_vma_insert_huge_pmd_page When migrate_vma_insert_huge_pmd_page() jumps to unlock_abort due to a PMD check failure, the pgtable allocated earlier via pte_alloc_one() is never freed, causing a memory leak. Added free_abort label to release the pgtable in error path.

Risk And Classification

EPSS: 0.001890000 probability, percentile 0.087850000 (date 2026-07-20)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected a30b48bf1b244f11bf9b6d20cdccfe0c2264130c 24861d04f197bb651e9dfb211978271c15f75a98 git Not specified
CNA Linux Linux affected a30b48bf1b244f11bf9b6d20cdccfe0c2264130c 2c6f81d58741349298f51ff697d988cb42881453 git Not specified
CNA Linux Linux affected 6.19 Not specified
CNA Linux Linux unaffected 6.19 semver Not specified
CNA Linux Linux unaffected 7.0.12 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/2c6f81d58741349298f51ff697d988cb42881453 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/24861d04f197bb651e9dfb211978271c15f75a98 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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