The Rx parser in tcpdump before 4.9.3 has a buffer over-read in print-rx.c:rx_cache_find() and rx_cache_insert().
lists.opensuse.org/opensuse-security-announce/2019-10/msg00050.html
lists.opensuse.org/opensuse-security-announce/2019-10/msg00053.html
seclists.org/fulldisclosure/2019/Dec/26
github.com/the-tcpdump-group/tcpdump/blob/tcpdump-4.9/CHANGES
github.com/the-tcpdump-group/tcpdump/commit/c24922e692a52121e853a84ead6b9337f4c08a94
lists.debian.org/debian-lts-announce/2019/10/msg00015.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62XY42U6HY3H2APR5EHNWCZ7SAQNMMJN/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNYXF3IY2X65IOD422SA6EQUULSGW7FN/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R2UDPOSGVJQIYC33SQBXMDXHH4QDSDMU/
seclists.org/bugtraq/2019/Dec/23
seclists.org/bugtraq/2019/Oct/28
security.netapp.com/advisory/ntap-20200120-0001/
support.apple.com/kb/HT210788
usn.ubuntu.com/4252-1/
usn.ubuntu.com/4252-2/
www.debian.org/security/2019/dsa-4547