Out-of-bounds read in Linux kernel - CVE-2026-80763

Vulnerability identifier: #VU147158

CSH Severity: Low

CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-80763

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform an out-of-bounds read.

The vulnerability exists due to an out-of-bounds read in the hci_cc_le_set_cig_params() handler when processing a truncated LE Set CIG Parameters response. A remote attacker can provide a malformed response with an advertised handle count that exceeds the remaining response data to perform an out-of-bounds read.

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/0acd4eeb4b225b9bebbf9ef96cc10cdd79b94899
• https://git.kernel.org/stable/c/26741d178f31932c9018b36b7953e6dc391436a4
• https://git.kernel.org/stable/c/6fc540e835dddb518cef3ff522b780f701cd03df
• https://git.kernel.org/stable/c/9e05783d0bb96a7b853cc058a7c7de2dc4a62154
• https://git.kernel.org/stable/c/a34df5c4a439cfc04565fa5be608ed1e53134f1f
• https://git.kernel.org/stable/c/d83ecb7b96105d932dabaa56ccd7418c25fb7cbb
• https://git.kernel.org/stable/c/e3f82e8f2a5915f533b57a065e9a045aa2ee03bc

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