CVE-2019-15847

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 _builtindarn() call may be the same.

References

Affected packages

Git / github.com/gcc-mirror/gcc

Affected ranges

Type

GIT

Repo

https://github.com/gcc-mirror/gcc

Events

Introduced

Fixed

b2d961e7342b5ba4e57adfa81cb189b738d10901

Introduced

Last affected

1b306039ac49f8ad91ca71d3de3150a3c9fa792a

Database specific

{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "fixed": "7.5.0"
        },
        {
            "introduced": "0"
        },
        {
            "last_affected": "15.1"
        }
    ]
}

Affected versions

Other

basepoints/gcc-0

basepoints/gcc-10

basepoints/gcc-11

basepoints/gcc-12

basepoints/gcc-13

basepoints/gcc-14

basepoints/gcc-15

basepoints/gcc-5

basepoints/gcc-6

basepoints/gcc-7

basepoints/gcc-8

basepoints/gcc-9

misc/cutover-cvs2svn

misc/cutover-egcs-0

misc/cutover-egcs-1

misc/cutover-git

misc/first-auto-changelog

releases/gcc-15.*

releases/gcc-15.1.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-15847.json"

unresolved_ranges

[
    {
        "events": [
            {
                "introduced": "8.0"
            },
            {
                "fixed": "8.4.0"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "9.0"
            },
            {
                "fixed": "9.3.0"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "10.0"
            },
            {
                "fixed": "10.1.0"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "15.0"
            }
        ]
    }
]