Description
libpcre in PCRE before 8.43 allows a subject buffer over-read in JIT when UTF is disabled, and \X or \R has more than one fixed quantifier, a related issue to CVE-2019-20454.
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 12 | pcre3 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | pcre3 | No fix yet | — |
| Ubuntu 24.04 LTS | pcre3 | No fix yet | — |
| Ubuntu 22.04 LTS | pcre3 | 2:8.39-13ubuntu0.22.04.1 | USN-5425-1 |
| Ubuntu 20.04 LTS | pcre3 | 2:8.39-12ubuntu0.1 | USN-5425-1 |
| Ubuntu 18.04 LTS | pcre3 | 2:8.39-9ubuntu0.1 | USN-5425-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | pcre3 | 2:8.38-3.1ubuntu0.1~esm1 | USN-5425-1 |
| Ubuntu Pro 14.04 LTS | pcre3 | 1:8.31-2ubuntu2.3+esm1 | USN-5425-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | pcre +5 | 8.42-6.el8 | RHSA-2021:4373 |
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 | 1.6.3-107.el8jbcs | RHSA-2021:4614 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-apr-util +8 | 1.6.1-84.el8jbcs | RHSA-2021:4614 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-curl +2 | 7.78.0-2.el8jbcs | RHSA-2021:4614 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-httpd +6 | 2.4.37-78.el8jbcs | RHSA-2021:4614 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_cluster-native | 1.3.16-9.Final_redhat_2.el8jbcs | RHSA-2021:4614 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_http2 | 1.15.7-21.el8jbcs | RHSA-2021:4614 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_jk +2 | 1.2.48-20.redhat_1.el8jbcs | RHSA-2021:4614 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_md | 1:2.0.8-40.el8jbcs | RHSA-2021:4614 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_security | 2.9.2-67.GA.el8jbcs | RHSA-2021:4614 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_ssl +1 | 1:2.4.37-78.el8jbcs | RHSA-2021:4614 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-nghttp2 +1 | 1.39.2-39.el8jbcs | RHSA-2021:4614 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl +4 | 1:1.1.1g-8.el8jbcs | RHSA-2021:4614 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl-chil | 1.0.0-7.el8jbcs | RHSA-2021:4614 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl-pkcs11 | 0.4.10-22.el8jbcs | RHSA-2021:4614 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | pcre +5 | 8.42-6.el8 | ALSA-2021:4373 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | pcre | 8.42-6.el8 | RLSA-2021:4373 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | pcre | 8.45-20.10.1 | SUSE-SU-2021:3529-1 |
| SLES 15 SP2 | pcre | 8.45-20.10.1 | SUSE-SU-2021:3529-1 |
| SLES 12 SP5 | pcre | 8.45-8.7.1 | SUSE-SU-2021:3652-1 |
| SLES 12 SP5 | selinux-policy | 20140730-36.5.2 | SUSE-SU-2021:3652-1 |
| SLES 12 SP4 | pcre | 8.45-8.7.1 | SUSE-SU-2021:3652-1 |
| SLES 12 SP4 | selinux-policy | 20140730-36.5.2 | SUSE-SU-2021:3652-1 |
| SLES 12 SP3 | pcre | 8.45-8.7.1 | SUSE-SU-2021:3652-1 |
| SLES 12 SP3 | selinux-policy | 20140730-36.5.2 | SUSE-SU-2021:3652-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | pcre | 8.45-8.7.1 | SUSE-SU-2021:3652-1 |
| SLES 12 SP2 | selinux-policy | 20140730-36.5.2 | SUSE-SU-2021:3652-1 |
| SLES for SAP 12 SP5 | pcre | 8.45-8.7.1 | SUSE-SU-2021:3652-1 |
| SLES for SAP 12 SP5 | selinux-policy | 20140730-36.5.2 | SUSE-SU-2021:3652-1 |
| SLES for SAP 12 SP4 | pcre | 8.45-8.7.1 | SUSE-SU-2021:3652-1 |
| SLES for SAP 12 SP4 | selinux-policy | 20140730-36.5.2 | SUSE-SU-2021:3652-1 |
| SLES for SAP 12 SP3 | pcre | 8.45-8.7.1 | SUSE-SU-2021:3652-1 |
| SLES for SAP 12 SP3 | selinux-policy | 20140730-36.5.2 | SUSE-SU-2021:3652-1 |
| SLE Micro 5.1 | pcre | 8.45-20.10.1 | SUSE-SU-2021:3529-1 |
| SLE Micro 5.0 | pcre | 8.45-20.10.1 | SUSE-SU-2021:3529-1 |
| SUSE OpenStack Cloud Crowbar 9 | pcre | 8.45-8.7.1 | SUSE-SU-2021:3652-1 |
| SUSE OpenStack Cloud Crowbar 9 | selinux-policy | 20140730-36.5.2 | SUSE-SU-2021:3652-1 |
| SUSE OpenStack Cloud Crowbar 8 | pcre | 8.45-8.7.1 | SUSE-SU-2021:3652-1 |
| SUSE OpenStack Cloud Crowbar 8 | selinux-policy | 20140730-36.5.2 | SUSE-SU-2021:3652-1 |
| SUSE OpenStack Cloud 9 | pcre | 8.45-8.7.1 | SUSE-SU-2021:3652-1 |
| SUSE OpenStack Cloud 9 | selinux-policy | 20140730-36.5.2 | SUSE-SU-2021:3652-1 |
| SUSE OpenStack Cloud 8 | pcre | 8.45-8.7.1 | SUSE-SU-2021:3652-1 |
| SUSE OpenStack Cloud 8 | selinux-policy | 20140730-36.5.2 | SUSE-SU-2021:3652-1 |
| SUSE HPE Helion OpenStack 8 | pcre | 8.45-8.7.1 | SUSE-SU-2021:3652-1 |
| SUSE HPE Helion OpenStack 8 | selinux-policy | 20140730-36.5.2 | SUSE-SU-2021:3652-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.3 | pcre | 8.45-20.10.1 | openSUSE-SU-2021:3529-1 |
| openSUSE Leap 15.2 | pcre | 8.45-lp152.7.6.1 | openSUSE-SU-2021:1441-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | pcre +5 | 8.42-6.el8 | ELSA-2021-4373 |
Advisories 13
- ALSA-2021:4373 Low: pcre security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2021:4614 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP10 security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2021:4373 Red Hat Security Advisory: pcre security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- USN-5425-1 pcre3 vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- RLSA-2021:4373 Low: pcre security update Rocky Linux Security Advisories · Feb 5, 2026
- openSUSE-SU-2021:1441-1 Security update for pcre SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:3529-1 Security update for pcre SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3529-1 Security update for pcre SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3652-1 Security update for pcre SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-2229 Splunk Splunk Enterprise: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 18, 2025
- WID-SEC-2022-1897 PCRE (Perl Compatible Regular Expressions): Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 24, 2024
- WID-SEC-2023-1614 Tenable Security Nessus Network Monitor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 25, 2023
- ELSA-2021-4373 Low: pcre security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 16, 2021
References
- https://bugs.gentoo.org/717920
- https://www.pcre.org/original/changelog.txt
- https://support.apple.com/kb/HT211931
- 20201215 APPLE-SA-2020-12-14-4 Additional information for APPLE-SA-2020-11-13-1 macOS Big Sur 11.0.1 mailing-list
- https://support.apple.com/kb/HT212147
- 20210201 APPLE-SA-2021-02-01-1 macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave mailing-list
- [mina-dev] 20210225 [jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar mailing-list