A security issue introduced in glibc 2.22 was announced on August 2: http://www.openwall.com/lists/oss-security/2016/08/02/5 The fix is a simple matter of reverting commit 2212c1420c92a33b0e0bd9a34938c9814a56c0f7 (apparently Fedora already has). Mageia 5 is not affected.
Fixed upstream in 2.24: https://www.sourceware.org/ml/libc-alpha/2016-08/msg00212.html
Fixed in cauldron since 2.22-16
Status: NEW => RESOLVEDResolution: (none) => FIXED
URL: (none) => http://lwn.net/Vulnerabilities/696694/