Off-by-one error in the READ_ENCINT macro in chmd.c in libmspack before 0.5 allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted CHM file.
https://security.gentoo.org/glsa/201506-01
https://euvd.enisa.europa.eu/vulnerability/EUVD-2015-4492
https://bugs.debian.org/775687