What’s Vulnerable › Vulnerabilities

CVE-2026-80759: Bluetooth: hci_aml: validate firmware segment lengths

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-04 · updated 2026-10-19

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.

Affected products

• Linux kernel: 6.12 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

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

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