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VulnerabilityPublished

CVE-2026-63953: Linux kernel · mm/migrate_device: fix pgtable leak in migrate_vma_insert_huge_pmd_page

Affects Linux kernelSource GCVE Database

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Not known to be exploited.

Data as of 30 Oct 2026, 15:47 UTC

Severity
Low

Rated Low by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

AI-suggested

A fix has been implemented in the Linux kernel to address this memory leak by properly freeing allocated page tables on error paths. Users should apply the official kernel updates that include this fix once available. No other mitigation actions are indicated.

Description

A memory leak vulnerability in the Linux kernel's memory management subsystem was fixed. The issue occurs in the function migrate_vma_insert_huge_pmd_page when an error path fails to free a previously allocated page table, leading to a pgtable leak. This was addressed by adding a label to properly release the allocated pgtable on error.

References

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