ax25_create in net/ax25/af_ax25.c in the AF_AX25 network module in the Linux kernel 3.16 through 5.3.2 does not enforce CAP_NET_RAW, which means that unprivileged users can create a raw socket, aka CID-0614e2b73768.
packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=2c675dab816278a1724c1e93b384c2f05a11cb31
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0614e2b73768b502fc32a75349823356d98aae2c
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0edc3f703f7bcaf550774b5d43ab727bcd0fe06b
lists.debian.org/debian-lts-announce/2020/01/msg00013.html
lists.debian.org/debian-lts-announce/2020/03/msg00001.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U6JNEWGIK7QA24OIUUL67QZNJN52NB7T/
seclists.org/bugtraq/2019/Nov/11
usn.ubuntu.com/4184-1/
usn.ubuntu.com/4185-1/
usn.ubuntu.com/4185-2/
usn.ubuntu.com/4186-1/
usn.ubuntu.com/4186-2/