Multiple stack-based buffer overflows in the word-list-compress functionality in compress.c for Aspell allow local users to execute arbitrary code via a long entry in the wordlist that is not properly handled when using the (1) "c" compress option or (2) "d" decompress option.
http://www.securityfocus.com/bid/10497
http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html