Red Hat Security Advisory 2018-2095-01 - The patch program applies diff files to originals. The diff command is used to compare an original to a changed file. Diff lists the changes made to the file. A person who has the original file can then use the patch command with the diff file to add the changes to their original file. Issues addressed include a code execution vulnerability.
f61bca2971306a29e1886236f08d98e28ad1c1323a9ec47e6ecfc713160c6192