CVE-2018-5407

lowpriority · track · 30EPSS 0.034 · 89 %ileexploit · PoCDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

3.42% (89th) EPSS

CVSS 1.9 · low

Is it mine?

167 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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'.

cvss

Technical severity, 0–10. One row per scoring source.

7.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 1.9–7.1

v2.01.9lowAV:L/AC:M/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 3.4 · impact 2.9

v3.14.7mediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 1 · impact 3.6

v3.17.1highAV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.14.5mediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-203USprimaryCWE-200USCWE-200USCWE-208US

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-45785Intel (Skylake / Kaby Lake) - 'PortSmash' CPU SMT Side-ChannelPoC · exploit_db

affected products (167)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Dell PowerEdge T40all versionscert_bundDEcpe:/h:dell:poweredge:t40
Dell Secure Connect Gateway <5.36.00.16all versionscert_bundDE
F5 BIG-IPall versionscert_bundDEcpe:/a:f5:big-ip:-
Gentoo Linuxall versionscert_bundDEcpe:/o:gentoo:linux:-
Open Source CentOSall versionscert_bundDEcpe:/o:centos:centos:-
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
Red Hat Enterprise Linux 7all versionscert_bundDEcpe:/o:redhat:enterprise_linux:7
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Dell Secure Connect Gateway< 5.36.00.16cert_bundDE
n/a Processors supporting Simultaneous Multi-Threading≤ N/Aenisa_euvdEU
Canonical Ltd. Ubuntu≤ 16.04 LTSfstec_bduRU
Canonical Ltd. Ubuntu≤ 14.04 LTSfstec_bduRU
Canonical Ltd. Ubuntu≤ 18.10fstec_bduRU
Canonical Ltd. Ubuntu≤ 18.04 LTSfstec_bduRU
IBM Corp. IBM Aix≤ 7.1fstec_bduRU
IBM Corp. IBM Aix≤ 7.2fstec_bduRU
IBM Corp. IBM Aix≤ 6.1fstec_bduRU

showing 20 of 167

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2022-0517Red Hat Enterprise Linux: Mehrere SchwachstellenDeutsch2019-08-06csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um dadurch die Integrität, Vertraulichkeit und Verfügbarkeit zu gefährden.
WID-SEC-W-2023-1594IBM Tivoli Network Manager: Mehrere SchwachstellenDeutsch2023-06-28csaf · cert_bundDE
Ein entfernter, anonymer, authentisierter oder lokaler Angreifer kann mehrere Schwachstellen in IBM Tivoli Network Manager ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand herbeizuführen, seine Privilegien auszuweiten, Daten zu manipulieren, nicht spezifizierte Auswirkungen zu verursachen und einen Cross-Site-Scripting-Angriff durchzuführen.
WID-SEC-W-2025-2349Intel Prozessoren: Schwachstelle ermöglicht Umgehen von SicherheitsvorkehrungenDeutsch2018-11-01csaf · cert_bundDE
Ein lokaler Angreifer kann eine Schwachstelle in Intel Prozessoren ausnutzen, um Informationen offenzulegen und Sicherheitsvorkehrungen zu umgehen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2018-11-15modified 2026-10-09

related (886)

Related entries.

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+881 more

references (110)

External citations — patches, advisories, analysis.

scry

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