Description
OpenSSL 1.1.1 introduced a rewritten random number generator (RNG). This was intended to include protection in the event of a fork() system call in order to ensure that the parent and child processes did not share the same RNG state. However this protection was not being used in the default case. A partial mitigation for this issue is that the output from a high precision timer is mixed into the RNG state so the likelihood of a parent and child process sharing state is significantly reduced. If an application already calls OPENSSL_init_crypto() explicitly using OPENSSL_INIT_ATFORK then this problem does not occur at all. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenSSL | OpenSSL | Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c) | — |
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 | 1.1.1d-1 | — |
| Debian 13 | openssl | 1.1.1d-1 | — |
| Debian 12 | openssl | 1.1.1d-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | openssl | 1.1.1-1ubuntu2.1~18.04.6 | USN-4376-1 |
| Ubuntu 16.04 LTS | openssl | 1.0.2g-1ubuntu4.16 | USN-4376-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | openssl +3 | 1:1.1.1c-15.el8 | RHSA-2020:1840 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat JBoss Core Services 1 | jbcs-httpd24-apr +1 | 1.6.3-86.jbcs.el6 | RHSA-2020:1337 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-brotli +1 | 1.0.6-21.jbcs.el6 | RHSA-2020:1337 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-httpd +6 | 2.4.37-52.jbcs.el6 | RHSA-2020:1337 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_cluster-native | 1.3.12-41.Final_redhat_2.jbcs.el6 | RHSA-2020:1337 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_http2 | 1.11.3-22.jbcs.el6 | RHSA-2020:1337 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_ssl +1 | 1:2.4.37-52.jbcs.el6 | RHSA-2020:1337 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl +4 | 1:1.1.1c-16.jbcs.el6 | RHSA-2020:1337 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | openssl-1_1 | 1.1.1d-2.20.1 | SUSE-SU-2020:0099-1 |
| SLES 12 SP4 | openssl-1_1 | 1.1.1d-2.20.1 | SUSE-SU-2020:0099-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | openssl-1_1 | 1.1.1d-2.20.1 | SUSE-SU-2020:0099-1 |
| SLES for SAP 12 SP4 | openssl-1_1 | 1.1.1d-2.20.1 | SUSE-SU-2020:0099-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openssl-1_1 | 1.1.1l-1.2 | openSUSE-SU-2024:11127-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | openssl | 1.1.1d-r1 | — |
| Alpine v3.23 | openssl | 1.1.1d-r1 | — |
| Alpine v3.22 | openssl | 1.1.1d-r1 | — |
| Alpine v3.21 | openssl | 1.1.1d-r1 | — |
| Alpine v3.20 | openssl | 1.1.1d-r1 | — |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | openssl | 1.1.1d-r1 | — |
| Alpine v3.18 | openssl +1 | 1.1.1d-r1 | — |
| Alpine v3.17 | openssl +1 | 1.1.1d-r1 | — |
| Alpine v3.16 | openssl +1 | 1.1.1d-r1 | — |
| Alpine v3.15 | openssl +1 | 1.1.1d-r1 | — |
| Alpine v3.14 | openssl | 1.1.1d-r1 | — |
| Alpine v3.13 | openssl | 1.1.1d-r1 | — |
| Alpine v3.12 | openssl | 1.1.1d-r1 | — |
| Alpine v3.11 | openssl | 1.1.1d-r1 | — |
| Alpine v3.10 | openssl | 1.1.1d-r0 | — |
| Alpine v3.9 | openssl | 1.1.1d-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | openssl11 +3 | 1:1.1.1c-15.amzn2.0.1 | ALAS2-2020-1456 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | openssl +3 | 1:1.1.1c-15.el8 | ELSA-2020-1840 |
Advisories 11
- WID-SEC-2026-4026 Red Hat OpenShift: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 18, 2026
- RHSA-2020:1840 Red Hat Security Advisory: openssl security and bug fix update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2020:1337 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP2 security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- USN-4376-1 openssl vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- SUSE-SU-2020:0099-1 Security update for openssl-1_1 SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-1762 OpenSSL: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Oct 20, 2025
- openSUSE-SU-2024:11127-1 libopenssl-1_1-devel-1.1.1l-1.2 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- WID-SEC-2023-1049 Oracle MySQL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 20, 2023
- ICSA-21-336-06 Hitachi Energy APM Edge CISA ICS & IT advisories · Dec 2, 2021
- ALAS2-2020-1456 Moderate: openssl11 security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jul 17, 2020
- ELSA-2020-1840 Moderate: openssl security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 5, 2020
References
- FEDORA-2019-d15aac6c4e vendor-advisory
- FEDORA-2019-d51641f152 vendor-advisory
- 20191001 [SECURITY] [DSA 4539-1] openssl security update mailing-list
- DSA-4539 vendor-advisory
- USN-4376-1 vendor-advisory
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://www.openssl.org/news/secadv/20190910.txt
- https://security.netapp.com/advisory/ntap-20190919-0002/
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=1b0fe00e2704b5e20334a16d3c9099d1ba2ef1be
- https://support.f5.com/csp/article/K44070243
- https://support.f5.com/csp/article/K44070243?utm_source=f5support&%3Butm_medium=RSS
- https://www.oracle.com/security-alerts/cpuoct2020.html