CVE-2026-64048 net/smc: reject CHID-0 ACCEPT that matches an empty ism_dev slot

In the Linux kernel, the following vulnerability has been resolved: net/smc: reject CHID-0 ACCEPT that matches an empty ismdev slot On the SMC-D client, slot 0 of ini-ismdev/ini-ismchid is reserved for an SMC-Dv1 device. smcfindismv2deviceclnt populates V2 entries starting at index 1, so when no ...