Security Advisory

CVE-2019-15847

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2019-09-02 22:03:34

Last updated 2024-08-05 01:03:30

Assigner mitre

State PUBLISHED

Description

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.

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