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.
Advisories
Source ID Title
EUVD EUVD EUVD-2019-6763 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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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-05T01:03:30.919Z

Reserved: 2019-09-02T00:00:00

Link: CVE-2019-15847

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-09-02T23:15:10.837

Modified: 2024-11-21T04:29:36.210

Link: CVE-2019-15847

cve-icon Redhat

Severity : Moderate

Publid Date: 2019-09-02T00:00:00Z

Links: CVE-2019-15847 - Bugzilla

cve-icon OpenCVE Enrichment

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Weaknesses