This update for glibc fixes the following security issues: - CVE-2017-15670: Prevent off-by-one error that lead to a heap-based buffer overflow in the glob function, related to the processing of home directories using the ~ operator followed by a long string - CVE-2017-15804: The glob function contained a buffer overflow during unescaping of user names with the ~ operator - CVE-2015-5180: res_query in libresolv allowed remote attackers to cause a denial of service . This non-security issue was fixed: - Fix inaccuracies in casin, cacos, casinh, cacosh