CVE-2019-18660
MEDIUMCVSS 4.7/10EPSS 0.74%
Last modified
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/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
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://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://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
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2019-18660?
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.
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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