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Vulnerability record · CVE-2018-5407 · published 15 November 2018

CVE-2018-5407: Canonical ubuntu linux information exposure vulnerability

Canonical · Ubuntu Linux

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'.

4.7 CVSS 3.1 Medium EPSS 3.4% · top 11.5% CWE-200 · Information exposureCWE-203 · Observable discrepancy
4.7CVSS 3.1 base score, v2 1.9
3.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
20Affected product versions listed by NVD
56References, 4 tagged exploit
17 Jun 2026Last modified by NVD

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'.

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

Affected products

20 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/105897 Third Party AdvisoryVDB 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 DescriptionThird Party Advisory
https://github.com/bbbrumley/portsmash ExploitThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/11/msg00024.html Mailing ListThird 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/ ExploitThird Party AdvisoryVDB Entry
https://www.oracle.com/security-alerts/cpuapr2020.html PatchThird Party Advisory
https://www.oracle.com/security-alerts/cpujan2020.html PatchThird Party Advisory
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html PatchThird Party Advisory
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html PatchVendor Advisory
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html PatchThird Party Advisory
https://www.tenable.com/security/tns-2018-16 Third Party Advisory
https://www.tenable.com/security/tns-2018-17 Third Party Advisory
http://www.securityfocus.com/bid/105897 Third Party AdvisoryVDB 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 DescriptionThird Party Advisory
https://github.com/bbbrumley/portsmash ExploitThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-5407), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.