CVE-2019-15847

HighCVSS 7.5/10Last modified Oct 14, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-331

Affected software

No affected versions have been published.

Timeline

Published
Sep 2, 2019
Last modified
Oct 14, 2026
NVD status
Modified

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