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'.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Processors supporting Simultaneous Multi-Threading | N/A | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | openssl | 1.1.1~~pre9-1 | — |
| Debian 13 | openssl | 1.1.1~~pre9-1 | — |
| Debian 12 | openssl | 1.1.1~~pre9-1 | — |
| Debian 9 | openssl | 1.1.0j-1~deb9u1 | DSA-4348-1 |
| Debian 9 | openssl1.0 | 1.0.2q-1~deb9u1 | DSA-4355-1 |
| Debian 8 | openssl | 1.0.1t-1+deb8u10 | DLA-1586-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | openssl | 1.1.0g-2ubuntu4.3 | USN-3840-1 |
| Ubuntu 18.04 LTS | openssl1.0 | 1.0.2n-1ubuntu5.2 | USN-3840-1 |
| Ubuntu 16.04 LTS | openssl | 1.0.2g-1ubuntu4.14 | USN-3840-1 |
| Ubuntu 14.04 LTS | openssl | 1.0.1f-1ubuntu2.27 | USN-3840-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | OVMF +1 | 20180508-6.gitee3198e672e2.el7 | RHSA-2019:2125 |
| RHEL 7 | imgbased +1 | 1.1.7-0.1.el7ev | RHBA-2019:1053 |
| RHEL 7 | openssl +4 | 1:1.0.2k-16.el7_6.1 | RHSA-2019:0483 |
| RHEL 7 | ovirt-node-ng +2 | 4.3.0-0.20181213.0.el7ev | RHBA-2019:1053 |
| RHEL 7 | redhat-release-virtualization-host +1 | 4.3-0.5.el7 | RHBA-2019:1053 |
| RHEL 7 | redhat-virtualization-host +1 | 4.3-20190409.0.el7_6 | RHBA-2019:1053 |
| RHEL 7 | rhvm-appliance | 2:4.3-20190409.0.el7 | RHBA-2019:1088 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat JBoss Web Server 5 | jws5-ecj | 4.12.0-1.redhat_1.1.el6jws | RHSA-2019:3929 |
| Red Hat JBoss Web Server 5 | jws5-javapackages-tools +1 | 3.4.1-5.15.11.el6jws | RHSA-2019:3929 |
| Red Hat JBoss Web Server 5 | jws5-jboss-logging | 3.3.2-1.Final_redhat_00001.1.el6jws | RHSA-2019:3929 |
| Red Hat JBoss Web Server 5 | jws5-mod_cluster +1 | 1.4.1-1.Final_redhat_00001.2.el6jws | RHSA-2019:3929 |
| Red Hat JBoss Web Server 5 | jws5-tomcat +9 | 9.0.21-10.redhat_4.1.el6jws | RHSA-2019:3929 |
| Red Hat JBoss Web Server 5 | jws5-tomcat-native | 1.2.21-34.redhat_34.el6jws | RHSA-2019:3929 |
| Red Hat JBoss Web Server 5 | jws5-tomcat-vault +1 | 1.1.8-1.Final_redhat_1.1.el6jws | RHSA-2019:3929 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-apr +1 | 1.6.3-63.jbcs.el6 | RHSA-2019:3933, RHSA-2019:3932 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-apr-util +8 | 1.6.1-48.jbcs.el6 | RHSA-2019:3933, RHSA-2019:3932 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-brotli +1 | 1.0.6-7.jbcs.el6 | RHSA-2019:3933, RHSA-2019:3932 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-curl +2 | 7.64.1-14.jbcs.el6 | RHSA-2019:3933, RHSA-2019:3932 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-httpd +7 | 2.4.37-33.jbcs.el6 | RHSA-2019:3933, RHSA-2019:3932 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-jansson +1 | 2.11-20.jbcs.el6 | RHSA-2019:3933, RHSA-2019:3932 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_cluster-native | 1.3.12-9.Final_redhat_2.jbcs.el6 | RHSA-2019:3933, RHSA-2019:3932 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_jk +2 | 1.2.46-22.redhat_1.jbcs.el6 | RHSA-2019:3933, RHSA-2019:3932 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_security | 2.9.2-16.GA.jbcs.el6 | RHSA-2019:3933, RHSA-2019:3932 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_ssl +1 | 1:2.4.37-33.jbcs.el6 | RHSA-2019:3933, RHSA-2019:3932 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-nghttp2 +1 | 1.39.2-4.jbcs.el6 | RHSA-2019:3933, RHSA-2019:3932 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl +4 | 1:1.1.1-25.jbcs.el6 | RHSA-2019:3933, RHSA-2019:3932 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | openssl-1_0_0 | 1.0.2p-3.11.1 | SUSE-SU-2018:4001-1 |
| SLES 12 SP4 | compat-openssl098 | 0.9.8j-106.9.1 | SUSE-SU-2018:4068-1 |
| SLES 12 SP4 | openssl-1_0_0 | 1.0.2p-3.3.1 | SUSE-SU-2018:3989-1 |
| SLES 12 SP3 | compat-openssl098 | 0.9.8j-106.9.1 | SUSE-SU-2018:4068-1 |
| SLES 12 SP3 | openssl | 1.0.2j-60.46.1 | SUSE-SU-2018:3866-1 |
| SLES 12 SP2 | openssl | 1.0.2j-60.46.1 | SUSE-SU-2018:3866-1 |
| SLES 12 SP1 | openssl | 1.0.1i-54.20.1 | SUSE-SU-2018:3864-1 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | compat-openssl098 | 0.9.8j-106.9.1 | SUSE-SU-2018:4068-1 |
| SLES 12 | nodejs4 | 4.9.1-15.17.1 | SUSE-SU-2019:0117-1 |
| SLES 12 | nodejs6 | 6.16.0-11.21.1 | SUSE-SU-2019:0395-1 |
| SLES 12 | openssl | 1.0.1i-27.34.1 | SUSE-SU-2019:1553-1 |
| SLES 11 SP4 | openssl | 0.9.8j-0.106.18.1 | SUSE-SU-2018:4274-1 |
| SLES 11 SP3 | openssl | 0.9.8j-0.106.18.1 | SUSE-SU-2018:4274-1 |
| SLES 11 | openssl1 | 1.0.1g-0.58.15.1 | SUSE-SU-2018:3964-1 |
| SUSE Studio Onsite 1.3 | openssl | 0.9.8j-0.106.18.1 | SUSE-SU-2018:4274-1 |
| SLES for SAP 12 SP4 | compat-openssl098 | 0.9.8j-106.9.1 | SUSE-SU-2018:4068-1 |
| SLES for SAP 12 SP4 | openssl-1_0_0 | 1.0.2p-3.3.1 | SUSE-SU-2018:3989-1 |
| SLES for SAP 12 SP3 | compat-openssl098 | 0.9.8j-106.9.1 | SUSE-SU-2018:4068-1 |
| SLES for SAP 12 SP3 | openssl | 1.0.2j-60.46.1 | SUSE-SU-2018:3866-1 |
| SLES for SAP 12 SP2 | compat-openssl098 | 0.9.8j-106.9.1 | SUSE-SU-2018:4068-1 |
| SLES for SAP 12 SP2 | openssl | 1.0.2j-60.46.1 | SUSE-SU-2018:3866-1 |
| SLES for SAP 12 SP1 | compat-openssl098 | 0.9.8j-106.9.1 | SUSE-SU-2018:4068-1 |
| SLES for SAP 12 SP1 | openssl | 1.0.1i-54.20.1 | SUSE-SU-2018:3864-2 |
| SLES for SAP 11 SP4 | openssl | 0.9.8j-0.106.18.1 | SUSE-SU-2018:4274-1 |
| SUSE OpenStack Cloud Crowbar 8 | nodejs6 | 6.16.0-11.21.1 | SUSE-SU-2019:0395-1 |
| SUSE OpenStack Cloud 7 | nodejs6 | 6.16.0-11.21.1 | SUSE-SU-2019:0395-1 |
| SUSE OpenStack Cloud 7 | openssl | 1.0.2j-60.46.1 | SUSE-SU-2018:3866-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | openssl | 0.9.8j-0.106.18.1 | SUSE-SU-2018:4274-1 |
| SUSE Enterprise Storage 4 | nodejs4 | 4.9.1-15.17.1 | SUSE-SU-2019:0117-1 |
| SUSE Enterprise Storage 4 | nodejs6 | 6.16.0-11.21.1 | SUSE-SU-2019:0395-1 |
| SUSE Enterprise Storage 4 | openssl | 1.0.2j-60.46.1 | SUSE-SU-2018:3866-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openssl-1_0_0 | 1.0.2u-6.2 | openSUSE-SU-2024:11126-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.8 | openssl | 1.0.2q-r0 | — |
| Alpine v3.7 | openssl | 1.0.2q-r0 | — |
| Alpine v3.6 | openssl | 1.0.2q-r0 | — |
| Alpine v3.5 | openssl | 1.0.2q-r0 | — |
| Alpine v3.4 | openssl | 1.0.2q-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.3 | openssl | 1.0.2q-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | openssl +4 | 1:1.0.2k-16.amzn2.1.1 | ALAS2-2019-1188 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | OVMF | 20180508-6.gitee3198e672e2.el7 | ELSA-2019-2125 |
| Oracle Linux 7 | openssl +4 | 1:1.0.2k-16.0.1.el7_6.1 | ELSA-2019-0483 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Intel (Skylake / Kaby Lake) - 'PortSmash' CPU SMT Side-Channel EDB-45785 · local · Nov 2, 2018
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 30
- WID-SEC-2022-0517 Red Hat Enterprise Linux: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 18, 2026
- RHSA-2019:3933 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.37 Security Release on RHEL 7 Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2019:3932 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.37 Security Release on RHEL 6 Red Hat Security Advisories (RHSA) · Oct 16, 2026
- WID-SEC-2022-1696 Oracle MySQL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 13, 2026
- RHSA-2019:3929 Red Hat Security Advisory: Red Hat JBoss Web Server 5.2 security release Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2019:2125 Red Hat Security Advisory: ovmf security and enhancement update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2019:0483 Red Hat Security Advisory: openssl security and bug fix update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHBA-2019:1088 Red Hat Bug Fix Advisory: rhvm-appliance security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHBA-2019:1053 Red Hat Bug Fix Advisory: redhat-virtualization-host bug fix and enhancement update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- USN-3840-1 openssl, openssl1.0 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4355-1 openssl1.0 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4348-1 openssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1586-1 openssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2018:3989-1 Security update for openssl-1_0_0 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3964-1 Security update for openssl1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0395-1 Security update for nodejs6 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0117-1 Security update for nodejs4 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:4001-1 Security update for openssl-1_0_0 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3864-2 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:4274-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11126-1 libopenssl-1_0_0-devel-1.0.2u-6.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1553-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:4068-1 Security update for compat-openssl098 SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-2349 Intel Prozessoren: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Oct 20, 2025
- SUSE-SU-2018:3866-1 Security update for openssl SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2018:3864-1 Security update for openssl SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2023-1594 IBM Tivoli Network Manager: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 28, 2023
- ELSA-2019-2125 Moderate: ovmf security and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 13, 2019
- ALAS2-2019-1188 Moderate: openssl security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 17, 2019
- ELSA-2019-0483 Moderate: openssl security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 13, 2019
References
- RHSA-2019:0483 vendor-advisory
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
- https://security.netapp.com/advisory/ntap-20181126-0001/
- USN-3840-1 vendor-advisory
- DSA-4355 vendor-advisory
- https://www.tenable.com/security/tns-2018-17
- https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/
- GLSA-201903-10 vendor-advisory
- https://www.tenable.com/security/tns-2018-16
- 45785 exploit
- [debian-lts-announce] 20181121 [SECURITY] [DLA 1586-1] openssl security update mailing-list
- https://github.com/bbbrumley/portsmash
- DSA-4348 vendor-advisory
- 105897 vdb-entry
- https://eprint.iacr.org/2018/1060.pdf
- RHSA-2019:0651 vendor-advisory
- RHSA-2019:0652 vendor-advisory
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
- RHSA-2019:2125 vendor-advisory
- https://support.f5.com/csp/article/K49711130?utm_source=f5support&%3Butm_medium=RSS
- RHSA-2019:3929 vendor-advisory
- RHSA-2019:3933 vendor-advisory
- RHSA-2019:3931 vendor-advisory
- RHSA-2019:3935 vendor-advisory
- RHSA-2019:3932 vendor-advisory
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://www.oracle.com/security-alerts/cpuapr2020.html