A security flaw was discovered in the nl80211_set_rekey_data() function in net/wireless/nl80211.c in the Linux kernel through 4.13.3. This function does not check whether the required attributes are present in a Netlink request. This request can be issued by a user with the CAP_NET_ADMIN capability and may result in a NULL pointer dereference and system crash.
https://bugzilla.novell.com/show_bug.cgi?id=1058410
https://bugzilla.redhat.com/show_bug.cgi?id=1491046
http://seclists.org/oss-sec/2017/q3/437
https://marc.info/?t=150525503100001&r=1&w=2
https://usn.ubuntu.com/3583-1/