CVE-2019-15847

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.

References

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91481

http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00058.html

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00057.html

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00056.html

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3