CVE-2019-15847

Published 02 Sep 2019 · Updated 14 Oct 2026

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3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 3.2%

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.

Affected products

n/a · n/a

References

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00056.html http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00057.html http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00058.html https://cert-portal.siemens.com/productcert/html/ssa-398330.html https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91481