Linux Kernel up to 7.0.11 mm migrate_device mm/migrate_device migrate_vma_insert_huge_pmd_page memory leak

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k2.16

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.0.11. It has been rated as critical. This vulnerability affects the function migrate_vma_insert_huge_pmd_page of the file mm/migrate_device of the component mm migrate_device. The manipulation leads to memory leak. This vulnerability is documented as CVE-2026-63953. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.0.11 and classified as critical. This issue affects the function migrate_vma_insert_huge_pmd_page of the file mm/migrate_device of the component mm migrate_device. The manipulation with an unknown input leads to a memory leak vulnerability. Using CWE to declare the problem leads to CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2026-63953 since 07/19/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/19/2026). The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 7.0.12 eliminates this vulnerability. Applying the patch 24861d04f197bb651e9dfb211978271c15f75a98 is able to eliminate this problem.

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Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 7.0.12
Patch: 24861d04f197bb651e9dfb211978271c15f75a98

Timelineinfo

07/19/2026 Advisory disclosed
07/19/2026 +0 days CVE reserved
07/19/2026 +0 days VulDB entry created
07/19/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-63953 (🔒)
GCVE (CVE): GCVE-0-2026-63953
GCVE (VulDB): GCVE-100-380471

Entryinfo

Created: 07/19/2026 20:46
Changes: 07/19/2026 20:46 (57)
Complete: 🔍
Cache ID: 216::103

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