Linux Kernel CVE-2026-68389

The primary fix is upgrading to a patched stable kernel release: 6.6.148 or later for the 6.6 LTS branch, 6.12.101 or later for the 6.12 branch, 6.18.42 or later for the 6.18 branch, or 7.1.6 or later for the 7.1 branch. All patch commits are available at the kernel stable tree links cited in the affected products section. Distribution-packaged kernels (Debian, Ubuntu, RHEL, Fedora, etc.) should receive these fixes through standard security update channels - apply pending kernel updates and reboot to activate. For systems where immediate kernel upgrade is not feasible, disabling Bluetooth entirely via rfkill block bluetooth eliminates the attack surface with no security downside, at the cost of Bluetooth functionality. Alternatively, blacklisting the hci_qca module by adding blacklist hci_qca to /etc/modprobe.d/blacklist.conf and rebooting prevents the driver from loading, though this disables QCA Bluetooth hardware completely. Restricting Bluetooth to paired, trusted devices via platform policy reduces opportunistic exposure but does not prevent exploitation by a sufficiently motivated attacker who can spoof or compromise a trusted device identity.