Via RH:

Recently an independent researcher had discovered a vulnerability in tcpdump,
which would be a segmentation fault triggered through feeding into tcpdump a
crafted packet, either from a live network interface or from a .pcap file. It
has been assigned CVE-2015-3138 and you can find the steps to reproduce it
here:

https://github.com/the-tcpdump-group/tcpdump/issues/446

Subsequent analysis made it clear that the vulnerability was introduced into
one of tcpdump functions by an accident not long before the 4.7.0 release. It
remained in tcpdump releases 4.7.2 and 4.7.3 (4.7.1 was never released). The
next release, 4.7.4, will have it fixed, but it is likely to be delayed. Since
the vulnerability has been public for a few weeks, meanwhile you might want to
fix it in an update to the tcpdump package. The fix is in the following commit:

https://github.com/the-tcpdump-group/tcpdump/commit/3ed82f4ed0095768529afc22b923c8f7171fff70

openSUSE 13.1: 4.4.0 not affected
openSUSE 13.2: 4.6.2 not affected
network:utilities: 4.7.3 affected
openSUSE:Factory: 4.7.3 affected

References:
https://bugzilla.redhat.com/show_bug.cgi?id=1212342
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-3138
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3138