The is_utf8_well_formed function in GNU less before 475 allows remote attackers to have unspecified impact via malformed UTF-8 characters, which triggers an out-of-bounds read.
advisories.mageia.org/MGASA-2015-0139.html
lists.fedoraproject.org/pipermail/package-announce/2015-June/159449.html
lists.opensuse.org/opensuse-updates/2015-03/msg00077.html
www.mandriva.com/security/advisories?name=MDVSA-2015:199
blog.fuzzing-project.org/3-less-out-of-bounds-read-access-TFPA-0022014.html