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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.49%
Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory gnu.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91481 issue tracking vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00056.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00057.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00058.html mailing list third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-15847?
CVE-2019-15847 has been scored as a high severity vulnerability.
How to fix CVE-2019-15847?
To fix CVE-2019-15847, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-15847 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-15847 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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