Carry propagation in Int.Exp Montgomery function was found in golang's math/big library, similar to CVE-2015-3193. This issue was introduced in the 1.5 release and remains present in 1.5.1 and 1.5.2.
Created golang tracking bugs for this issue:
Affects: epel-6 [bug 1293449]
Affects: fedora-all [bug 1293451]
golang-1.5.3-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
golang-1.5.3-1.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.