Linux Kernel CVE-2026-31688

Upgrade to Linux kernel version 7.0 or later, which includes the fix commit dc23806a7c47ec5f1293aba407fb69519f976ee0. For enterprise distributions on long-term support kernels, apply vendor-provided backports from your distribution's security advisory channel (RHEL, Ubuntu, SUSE security repos). The upstream fix is available at https://git.kernel.org/stable/c/dc23806a7c47ec5f1293aba407fb69519f976ee0 for manual backporting if necessary. If immediate patching is not feasible, implement compensating controls: restrict write access to /sys/bus/*/drivers/*/bind and /sys/bus/*/devices/*/driver_override sysfs attributes to root-only by setting restrictive permissions or using SELinux/AppArmor policies, though this may break legitimate userspace driver management tools like udev or device management daemons. In containerized environments, use seccomp profiles or LSM policies to block write access to these sysfs paths from untrusted containers. Note that restricting sysfs access may prevent dynamic driver binding functionality required for hotplug devices or manual driver overrides. Test thoroughly in staging before production deployment as driver binding is critical for hardware detection.