The glibc packages provide the standard C libraries , POSIX thread libraries , standard math libraries , and the name service cache daemon used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. Security Fix: glibc: Out of bounds write in iconv conversion to ISO-2022-CN-EXT glibc: stack-based buffer overflow in netgroup cache glibc: null pointer dereferences after failed netgroup cache insertion glibc: netgroup cache may terminate daemon on memory allocation failure glibc: netgroup cache assumes NSS callback uses in-buffer strings For more details about the security issue, including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page listed in the References section.