Linux Kernel CVE-2026-31758

Upgrade to patched Linux kernel versions: 5.10.253 or later for the 5.10 LTS branch, 5.15.203 or later for 5.15 LTS, 6.1.168 or later for 6.1 LTS, 6.6.134 or later for 6.6 stable, 6.12.81 or later for 6.12, 6.18.22 or later for 6.18, 6.19.12 or later for 6.19, or 7.0 for mainline. Specific fix commits are documented at https://git.kernel.org/stable/c/959ef329071136e4335b54822fe2f607659b4569 (mainline) and branch-specific commits at the kernel.org references provided. If immediate patching is not feasible, unload the usbtmc kernel module (rmmod usbtmc) to completely eliminate the attack surface, though this prevents use of USB test and measurement equipment; this mitigation has no performance impact but breaks functionality for USBTMC-dependent applications. Alternatively, restrict access to /dev/usbtmc* device nodes via udev rules to trusted users only, limiting the local authenticated attack prerequisite, though this reduces defense depth and does not eliminate the vulnerability. Verify no USBTMC hardware is attached in environments where test equipment is not required, as the driver poses no risk without physical USB TMC devices.