Out-of-bounds read in Linux kernel - CVE-2026-80759

Vulnerability identifier: #VU147163

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-80759

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to read beyond loaded firmware data.

The vulnerability exists due to an out-of-bounds read in the aml_download_firmware() function of the hci_aml Bluetooth driver when processing a truncated or inconsistent firmware image. A local user can provide a crafted firmware image to read beyond loaded firmware data.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)

Install security update from vendor's repository.

linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17

• 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

• Out-of-bounds read in Linux kernel bluetooth driver
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more