The libmspack packages contain a library providing compression and extraction of the Cabinet file format used by Microsoft. Security Fix: * libmspack: off-by-one error in the CHM PMGI/PMGL chunk number validity checks * libmspack: off-by-one error in the CHM chunk number validity checks * libmspack: out-of-bounds write in kwajd_read_headers in mspack/kwajd.c * libmspack: off-by-one error in the TOLOWER macro for CHM decompression For more details about the security issue, including the impact, a CVSS score, and other related information, refer to the CVE page listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.6 Release Notes linked from the References section.