Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2018-5407

CVE-2018-5407MEDIUM

N/A Processors supporting Simultaneous Multi-Threading — Simultaneous Multi-threading (SMT) in processors can enable local users to exploit software vulnerable to timing attacks via a side-chann…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   H   L   N  U  H  N  N    4.7   .0342   88.7     —

AFFECTED
  Product                                             Versions  Fixed
  Processors supporting Simultaneous Multi-Threading  N/A –     —

TIMELINE
  Jan 12  Reserved by certcc
  Nov 15  Published (CNA: certcc)
  Oct 8   ENRICHED — CVE-2018-5407 (Processors supporting Simultaneous Multi-Threading). Received CVSS 4.7 and CPE data from NVD.

CWE-203, CWE-200 · CNA: certcc · CVSS v3.1 · 28 references · NVD status: Modified

Description

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'.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
January 12, 2018	Reserved	Reserved by certcc
November 15, 2018	Published	Published (CNA: certcc)
October 8, 2026	ENRICHED	ENRICHED — CVE-2018-5407 (Processors supporting Simultaneous Multi-Threading). Received CVSS 4.7 and CPE data from NVD.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
N/A	Processors supporting Simultaneous Multi-Threading	—	N/A	—

Weaknesses

CWE-203 · CWE-200

References (28)

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]

Authoritative record: CVE-2018-5407 at cve.org

Weaknesses: CWE-203 · CWE-200

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2018-5407 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.