CVE-2019-18660

Name: CVE-2019-18660
Creator: NVD / NIST
Published: 2019-11-27T23:15:10.96+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.7/10EPSS 0.74%

Last modified Jun 17, 2026

CVE-2019-18660 is a medium-severity vulnerability rated 4.7/10 on the CVSS scale. The Linux kernel before 5.4.1 on powerpc allows Information Exposure because the Spectre-RSB mitigation is not in place for all applicable CPUs, aka CID-39e72bf96f58. This is related to arch/powerpc/kernel/entry_64.S and arch/powerpc/kernel/security.c.. EPSS estimates a 0.74% chance of exploitation in the next 30 days.

Description

The Linux kernel before 5.4.1 on powerpc allows Information Exposure because the Spectre-RSB mitigation is not in place for all applicable CPUs, aka CID-39e72bf96f58. This is related to arch/powerpc/kernel/entry_64.S and arch/powerpc/kernel/security.c.

Metrics

CVSS 3.1

4.7/10

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.74%

49.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 5.4.1
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	19.04
Canonical	Ubuntu Linux	19.10
Fedoraproject	Fedora	30
Fedoraproject	Fedora	31
Opensuse	Leap	15.1
Redhat	Enterprise Linux	6.0
Redhat	Enterprise Linux	7.0
Redhat	Enterprise Linux	8.0

References

http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.htmlThird Party Advisory
http://packetstormsecurity.com/files/155890/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.htmlThird Party Advisory, VDB Entry
http://www.openwall.com/lists/oss-security/2019/11/27/1Mailing List, Patch, Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0174Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.1Release Notes, Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=39e72bf96f5847ba87cc5bd7a3ce0fed813dc9adPatch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LYIFGYEDQXP5DVJQQUARQRK2PXKBKQGY/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YWWOOJKZ4NQYN4RMFIVJ3ZIXKJJI3MKP/
https://seclists.org/bugtraq/2020/Jan/10Mailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20200103-0001/Third Party Advisory
https://usn.ubuntu.com/4225-1/Third Party Advisory
https://usn.ubuntu.com/4225-2/Third Party Advisory
https://usn.ubuntu.com/4226-1/Third Party Advisory
https://usn.ubuntu.com/4227-1/Third Party Advisory
https://usn.ubuntu.com/4227-2/Third Party Advisory
https://usn.ubuntu.com/4228-1/Third Party Advisory
https://usn.ubuntu.com/4228-2/Third Party Advisory
https://www.openwall.com/lists/oss-security/2019/11/27/1Mailing List, Patch, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.htmlThird Party Advisory
http://packetstormsecurity.com/files/155890/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.htmlThird Party Advisory, VDB Entry
http://www.openwall.com/lists/oss-security/2019/11/27/1Mailing List, Patch, Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0174Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.1Release Notes, Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=39e72bf96f5847ba87cc5bd7a3ce0fed813dc9adPatch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LYIFGYEDQXP5DVJQQUARQRK2PXKBKQGY/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YWWOOJKZ4NQYN4RMFIVJ3ZIXKJJI3MKP/
https://seclists.org/bugtraq/2020/Jan/10Mailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20200103-0001/Third Party Advisory
https://usn.ubuntu.com/4225-1/Third Party Advisory
https://usn.ubuntu.com/4225-2/Third Party Advisory
https://usn.ubuntu.com/4226-1/Third Party Advisory
https://usn.ubuntu.com/4227-1/Third Party Advisory
https://usn.ubuntu.com/4227-2/Third Party Advisory
https://usn.ubuntu.com/4228-1/Third Party Advisory
https://usn.ubuntu.com/4228-2/Third Party Advisory
https://www.openwall.com/lists/oss-security/2019/11/27/1Mailing List, Patch, Third Party Advisory

Timeline

Published: Nov 27, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-18660?

How severe is CVE-2019-18660?

CVE-2019-18660 has a CVSS score of 4.7/10 (MEDIUM severity). The EPSS model estimates a 0.74% probability of exploitation in the next 30 days.

How do I fix CVE-2019-18660?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-18660?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST