The POWER9 backend in GNU Compiler... CVE-2019-15847

5.0 AV AC AU C I A
发布: 2019-09-02
修订: 2019-09-10

The POWER9 backend in GNU Compiler Collection (GCC) before version 10 could optimize multiple calls of the __builtin_darn intrinsic into a single call, thus reducing the entropy of the random number generator. This occurred because a volatile operation was not specified. For example, within a single execution of a program, the output of every __builtin_darn() call may be the same.