CVE-2026-80981 net/smc: fix use-after-free of the LLC qentry in smc_llc_srv_add_link()

In the Linux kernel, the following vulnerability has been resolved: net/smc: fix use-after-free of the LLC qentry in smcllcsrvaddlink smcllcsrvaddlink keeps addllc pointing into the queue entry: addllc = &qentry-msg.addlink; smcllc.c:1482 ... smcllcsaveaddlinkinfolinknew, addllc; smcllc.c:1494...

CVE-2026-80981

CVE-2026-80981 is a use-after-free in the Linux kernel's net/smc (Scalable Multiconnect) networking component, specifically in smc_llc_srv_add_link(). The function retains a pointer (add_llc) into an LLC queue entry, then frees that entry via smc_llc_flow_qentry_del(), and subsequently dereferenc...