CVE-2019-15847

HIGH 7.5CVE-2019-15847 · Published 02/09/2019 · updated 14/10/2026

In short

CVE-2019-15847 is a HIGH (CVSS 7.5) vulnerability affecting gcc (gnu).
Chance of exploitation in the next 30 days (EPSS): 3.2%, higher than 88.1% of all vulnerabilities.
Fix: update to 10.1.0, 8.4.0, 9.3.0, 7.5.0 or later.

Package	Affected versions	Patched versions
gcc gnu	`≥ 10.0, < 10.1.0≥ 8.0, < 8.4.0≥ 9.0, < 9.3.0< 7.5.0`	`10.1.08.4.09.3.07.5.0`

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

lists.opensuse.org/opensuse-security-announce/2019-10/msg00056.html · Mailing List
lists.opensuse.org/opensuse-security-announce/2019-10/msg00057.html · Mailing List
lists.opensuse.org/opensuse-security-announce/2020-05/msg00058.html · Mailing List
gcc.gnu.org/bugzilla/show_bug.cgi · Issue Tracking
cert-portal.siemens.com/productcert/html/ssa-398330.html

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Package

Affected versions

Patched versions

gcc

gnu

≥ 10.0, < 10.1.0≥ 8.0, < 8.4.0≥ 9.0, < 9.3.0< 7.5.0

10.1.08.4.09.3.07.5.0

Description

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