Linux Kernel up to 7.1.7 Device Migration migrate_vma_collect_pmd uninitialized variable

CVSS Meta Temp Score
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CTI Interest Score
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9.5$0-$5k0.00

Summaryinfo

A vulnerability classified as very critical was found in Linux Kernel up to 6.1.183/6.6.152/6.12.102/6.18.43/7.1.7. The impacted element is the function migrate_vma_collect_pmd of the component Device Migration. Executing a manipulation can lead to uninitialized variable. The identification of this vulnerability is CVE-2026-80686. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.1.183/6.6.152/6.12.102/6.18.43/7.1.7 and classified as very critical. This vulnerability affects the function migrate_vma_collect_pmd of the component Device Migration. The manipulation with an unknown input leads to a uninitialized variable vulnerability. The CWE definition for the vulnerability is CWE-457. The code uses a variable that has not been initialized, leading to unpredictable or unintended results. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2026-80686 since 08/26/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/29/2026).

The vulnerability scanner Nessus provides a plugin with the ID 341331 (Linux Distros Unpatched Vulnerability : CVE-2026-80686), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.184, 6.6.153, 6.12.103, 6.18.44 or 7.1.8 eliminates this vulnerability. Applying the patch 26f9ca8ed42cba25d2c75daff13561cce6019395/5b948706f11a950bc73c5304630d0a7eafc40daf/86d55447de3738620b9a8272ff167ce97e7f7203/2be94d6b20789b8865b1864dae5fe458ca85e019/42f30fa5481a1f90571ccdfbb20d2e25e47ae76e/63867c82d0c0c2d182016a32b1cc0103116b0ea5 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (341331) and CERT Bund (WID-SEC-2026-3075). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Open Source Linux Kernel

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: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Uninitialized variable
CWE: CWE-457 / CWE-453
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 341331
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-80686

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.1.184/6.6.153/6.12.103/6.18.44/7.1.8
Patch: 26f9ca8ed42cba25d2c75daff13561cce6019395/5b948706f11a950bc73c5304630d0a7eafc40daf/86d55447de3738620b9a8272ff167ce97e7f7203/2be94d6b20789b8865b1864dae5fe458ca85e019/42f30fa5481a1f90571ccdfbb20d2e25e47ae76e/63867c82d0c0c2d182016a32b1cc0103116b0ea5

Timelineinfo

08/26/2026 CVE reserved
08/28/2026 +2 days Advisory disclosed
08/28/2026 +0 days VulDB entry created
08/29/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-80686 (🔒)
GCVE (CVE): GCVE-0-2026-80686
GCVE (VulDB): GCVE-100-396634
CERT Bund: WID-SEC-2026-3075 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 08/28/2026 10:58
Updated: 08/29/2026 18:31
Changes: 08/28/2026 10:58 (59), 08/29/2026 04:18 (2), 08/29/2026 18:31 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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