Linux Kernel CVE-2026-31780

Update to patched Linux kernel versions appropriate for your deployed branch: 5.10.253+ for 5.10.x series, 5.15.203+ for 5.15.x, 6.1.168+ for 6.1.x, 6.6.134+ for 6.6.x, 6.12.81+ for 6.12.x, 6.18.22+ for 6.18.x, 6.19.12+ for 6.19.x, or 7.0+ for mainline. Patch commits are available at https://git.kernel.org/stable/ with commit hashes listed in references section. Organizations unable to immediately patch should assess if wilc1000 WiFi hardware is present in their environment (check lsmod for wilc1000_sdio or wilc1000_spi modules, or dmesg for wilc1000 references). If the driver is not loaded or hardware not present, the attack surface does not exist. As a temporary compensating control, the wilc1000 driver module can be blacklisted to prevent loading (add 'blacklist wilc1000_sdio' and 'blacklist wilc1000_spi' to /etc/modprobe.d/blacklist.conf), though this disables WiFi functionality for affected hardware. No runtime sysctl or configuration-based workaround exists to mitigate the overflow without patching. For embedded systems with wilc1000 chipsets where kernel updates are complex, consider network segmentation to limit local access by untrusted users, though this only reduces attack surface rather than eliminating the vulnerability.