VULNERABILITY INTELLIGENCE

CVE-2019-15847

CVSS score7.5 HIGH
EPSS probability3.18%
CISA KEVNot currently listed
Published2019-09-02
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

Weakness classification

  • CWE-331: Insufficient Entropy

Primary references