CVE-2026-46275

A flaw was found in the Linux kernel's Bluetooth hci_uart component. Lifecycle management issues, including Use-After-Free (UAF) and race conditions, were identified during the closing and initialization paths. These issues can lead to the dereferencing of freed memory, potentially causing system instability, crashes, or arbitrary code execution.

This vulnerability is rated as having Moderate impact for Red Hat Enterprise Linux because exploitation requires local access, specific user privileges to attach or configure TTY line disciplines, and winning timing-dependent race conditions during device initialization or teardown. In standard enterprise server and cloud deployments, Bluetooth UART interfaces are rarely enabled or utilized. Successful exploitation could allow a local authenticated attacker to cause a kernel crash or potentially execute arbitrary code on systems where Bluetooth serial line disciplines are actively attached.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.