Is CVE-2018-5407 being actively exploited?

CVE-2018-5407 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2018-5407?

CVE-2018-5407 has a CVSS 3.1 base score of 4.7 (MEDIUM).

CVE-2018-5407

MEDIUM · CVSS 4.7EPSS 3.4%EU EUVD

Simultaneous Multi-threading (SMT) in processors can enable local users to exploit software vulnerable to timing attacks via a side-channel timing attack on 'port contention'.

Key facts

CVSS score: 4.7 (v3.1)
Severity: MEDIUM
CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-200
EPSS score: 3.4% (89th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2018-17177)
Published: November 15, 2018
NVD last modified: October 8, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2018-17177 in the EU Vulnerability Database. Last updated in EUVD on October 8, 2026.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
debian / debian linux
debian / debian linux
nodejs / node.js
openssl / openssl
oracle / api gateway
oracle / application server
oracle / application server
oracle / application server
oracle / enterprise manager base platform
oracle / enterprise manager base platform
oracle / enterprise manager base platform
oracle / enterprise manager ops center
oracle / mysql enterprise backup
oracle / peoplesoft enterprise peopletools
oracle / peoplesoft enterprise peopletools
oracle / peoplesoft enterprise peopletools
oracle / primavera p6 enterprise project portfolio management
oracle / primavera p6 enterprise project portfolio management
oracle / primavera p6 enterprise project portfolio management
oracle / primavera p6 enterprise project portfolio management
oracle / primavera p6 enterprise project portfolio management
oracle / primavera p6 enterprise project portfolio management
oracle / primavera p6 enterprise project portfolio management
oracle / tuxedo
oracle / vm virtualbox
redhat / enterprise linux desktop
redhat / enterprise linux server
redhat / enterprise linux server
redhat / enterprise linux server aus
redhat / enterprise linux server eus
redhat / enterprise linux server tus
redhat / enterprise linux workstation
tenable / nessus

Certified products that may be affected

3 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Red Hat Enterprise Linux 7 OpenSSH Server Cryptographic Module - Red Hat®, Inc. - FIPS 140 3891 - historical
Red Hat Enterprise Linux 7.6 - Red Hat, Inc. - Common Criteria CCEVS-VR-VID-11039-2020 - archived
Tenable SecurityCenter 4.4 (SC) and Components: 3D Tool 2.0.1 Log Correlation Engine 3.6 (LCE), Passive Vulnerability Scanner 3.6 (PVS), Nessus 5.0.1, and xTool 2.1 - Tenable Network Security, Inc. - Common Criteria CCEVS-VR-VID-10443-2012 - archived

References

http://www.securityfocus.com/bid/105897(Third Party Advisory, VDB Entry)
https://access.redhat.com/errata/RHSA-2019:0483(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:0651(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:0652(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:2125(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:3929(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:3931(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:3932(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:3933(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2019:3935(Third Party Advisory)
https://eprint.iacr.org/2018/1060.pdf(Technical Description, Third Party Advisory)
https://github.com/bbbrumley/portsmash(Exploit, Third Party Advisory)
https://lists.debian.org/debian-lts-announce/2018/11/msg00024.html(Mailing List, Third Party Advisory)
https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/(Third Party Advisory)
https://security.gentoo.org/glsa/201903-10(Third Party Advisory)
https://security.netapp.com/advisory/ntap-20181126-0001/(Third Party Advisory)
https://support.f5.com/csp/article/K49711130?utm_source=f5support&amp%3Butm_medium=RSS
https://usn.ubuntu.com/3840-1/(Third Party Advisory)
https://www.debian.org/security/2018/dsa-4348(Third Party Advisory)
https://www.debian.org/security/2018/dsa-4355(Third Party Advisory)
https://www.exploit-db.com/exploits/45785/(Exploit, Third Party Advisory, VDB Entry)
https://www.oracle.com/security-alerts/cpuapr2020.html(Patch, Third Party Advisory)
https://www.oracle.com/security-alerts/cpujan2020.html(Patch, Third Party Advisory)
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html(Patch, Third Party Advisory)
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html(Patch, Vendor Advisory)
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html(Patch, Third Party Advisory)
https://www.tenable.com/security/tns-2018-16(Third Party Advisory)
https://www.tenable.com/security/tns-2018-17(Third Party Advisory)

Last updated October 10, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain