In the Linux kernel, the following vulnerability has been resolved: net/sctp: fix a null dereference in sctpdisposition sctpsfdo51Dce() If newasoc->peer.adaptationind=0 and sctpulpeventmakeauthkey=0 and sctpulpeventmakeauthkey() returns 0, then the variable aiev remains zero and the zero will be dereferenced in the sctpulpevent_free() function.