Out-of-bounds write in Linux kernel - CVE-2023-7356
Published: October 22, 2026
Vulnerability identifier: #VU156730
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-7356
CWE-ID: CWE-787
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker on the local network to potentially cause a denial of service through kernel memory corruption.
The vulnerability exists due to an out-of-bounds write in the Linux kernel Bluetooth ISO component when processing periodic advertisement reports without adequately validating the service UUID and data length before copying data into the BASE buffer. A remote attacker on the local network can transmit a specially crafted Bluetooth periodic advertisement to potentially overwrite kernel memory and cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2023-7356
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3