Bug 2502374 (CVE-2026-63953) - CVE-2026-63953 kernel: mm/migrate_device: fix pgtable leak in migrate_vma_insert_huge_pmd_page
Summary: CVE-2026-63953 kernel: mm/migrate_device: fix pgtable leak in migrate_vma_ins...
Keywords:
Status: NEW
Alias: CVE-2026-63953
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-19 16:04 UTC by OSIDB Bzimport
Modified: 2026-07-21 22:23 UTC (History)
2 users (show)

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Description OSIDB Bzimport 2026-07-19 16:04:38 UTC 
In 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.
Comment 1 Keith Grant 2026-07-21 22:21:19 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026071955-CVE-2026-63953-4f91@gregkh/T
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