CVE-2026-80676
Received Received - Intake

VMBus Driver Override Use-After-Free in Linux Kernel

Publication date: 2026-08-28

Last updated on: 2026-08-28

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: Drivers: hv: vmbus: use generic driver_override infrastructure When a driver is probed through __driver_attach(), the bus' match() callback is called without the device lock held, thus accessing the driver_override field without a lock, which can cause a UAF. Fix this by using the driver-core driver_override infrastructure taking care of proper locking internally. Note that calling match() from __driver_attach() without the device lock held is intentional. [1]

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Meta Information

Published
2026-08-28
Last Modified
2026-08-28
Generated
2026-09-17
AI Q&A
2026-08-28
EPSS Evaluated
2026-09-15
NVD
CVE-2026-80676
EUVD
EUVD-2026-67552

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is a Use-After-Free (UAF) issue in the Linux kernel's hyperv (vmbus) driver. It occurs when the driver_override field is accessed without proper locking during device probing, leading to potential memory corruption or crashes.

Detection Guidance

This vulnerability is specific to the Linux kernel's hv/vmbus driver and involves improper handling of driver_override. Detection requires checking kernel logs for related errors or examining the hv/vmbus driver configuration. No direct network detection commands are applicable.

Impact Analysis

This vulnerability could cause system instability, crashes, or privilege escalation if exploited. It primarily affects systems using the hyperv (vmbus) driver, potentially leading to denial-of-service or unauthorized access.

Compliance Impact

The provided CVE data does not describe any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves a driver_override field access issue in the Linux kernel's vmbus driver, which could lead to a use-after-free (UAF) condition. Without explicit details on data handling or exposure risks, its compliance impact remains unclear.

Mitigation Strategies

Update the Linux kernel to the latest patched version to resolve the driver_override UAF issue in the vmbus driver.

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