CVE-2026-80759: Linux kernel · Bluetooth: hci_aml: validate firmware segment lengths
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 4 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix has been implemented in the Linux kernel to validate firmware segment lengths and reject malformed firmware images before processing. Users should update to the fixed Linux kernel version containing this patch once available.
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.
References
- nvd.nist.gov/vuln/detail/CVE-2026-80759 (opens in a new tab)
- git.kernel.org/stable/c/2763b8bcb504e30ec955474f51b99ce42fc62f3b (opens in a new tab)
- git.kernel.org/stable/c/2bf6b9baca9372ea51b6d0f2820dc9bf29a83ef4 (opens in a new tab)
- git.kernel.org/stable/c/6c70253462902d835e843b470f74aa816d60af80 (opens in a new tab)
- git.kernel.org/stable/c/7733b01ed13685773ccda91035a46f87d4cfef7c (opens in a new tab)
- git.kernel.org/stable/c/e1534d49a7b8ba728e84b020f6d802aa1cb759d9 (opens in a new tab)
- ubuntu.com/security/CVE-2026-80759 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-80759 (opens in a new tab)
- git.kernel.org/linus/2bf6b9baca9372ea51b6d0f2820dc9bf29a83ef4 (opens in a new tab)