The HNCP parser in tcpdump before 4.9.3 has a buffer over-read in print-hncp.c:print_prefix().
Created tcpdump tracking bugs for this issue:
Affects: fedora-all [bug 1760626]
This issue does not affect the versions of tcpdump as shipped with Red Hat Enterprise Linux 7 as they already include the patch.
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):
This issue has been addressed in the following products:
Red Hat Enterprise Linux 8
Via RHSA-2020:4760 https://access.redhat.com/errata/RHSA-2020:4760