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://usn.ubuntu.com/3583-2/
https://usn.ubuntu.com/3583-1/
https://marc.info/?t=150525503100001&r=1&w=2
https://bugzilla.redhat.com/show_bug.cgi?id=1491046
https://bugzilla.novell.com/show_bug.cgi?id=1058410
http://www.securityfocus.com/bid/100855