Description
libpcre1 in PCRE 8.40 and libpcre2 in PCRE2 10.23 allow remote attackers to cause a denial of service (segmentation violation for read access, and application crash) by triggering an invalid Unicode property lookup.
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 | pcre2 | 10.22-3 | — |
| Debian 13 | pcre2 | 10.22-3 | — |
| Debian 12 | pcre2 | 10.22-3 | — |
| Debian 12 | pcre3 | 2:8.39-3 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | pcre2 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | pcre3 | 2:8.38-3.1ubuntu0.1~esm2 | USN-5665-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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 |
| 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 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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 |
| 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 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | pcre | 8.40-r2 | — |
| Alpine v3.23 | pcre | 8.40-r2 | — |
| Alpine v3.22 | pcre | 8.40-r2 | — |
| Alpine v3.21 | pcre | 8.40-r2 | — |
| Alpine v3.20 | pcre | 8.40-r2 | — |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | pcre | 8.40-r2 | — |
| Alpine v3.18 | pcre | 8.40-r2 | — |
| Alpine v3.17 | pcre | 8.40-r2 | — |
| Alpine v3.16 | pcre | 8.40-r2 | — |
| Alpine v3.15 | pcre | 8.40-r2 | — |
| Alpine v3.14 | pcre | 8.40-r2 | — |
| Alpine v3.13 | pcre | 8.40-r2 | — |
| Alpine v3.12 | pcre | 8.40-r2 | — |
| Alpine v3.11 | pcre | 8.40-r2 | — |
| Alpine v3.10 | pcre | 8.40-r2 | — |
| Alpine v3.9 | pcre | 8.40-r2 | — |
| Alpine v3.8 | pcre | 8.40-r2 | — |
| Alpine v3.7 | pcre | 8.40-r2 | — |
| Alpine v3.6 | pcre | 8.40-r2 | — |
Advisories 2
- USN-5665-1 pcre3 vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- SUSE-SU-2021:3652-1 Security update for pcre SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://bugs.exim.org/show_bug.cgi?id=2052
- GLSA-201710-09 vendor-advisory
- https://vcs.pcre.org/pcre/code/trunk/pcre_internal.h?r1=1649&r2=1688&sortby=date
- https://vcs.pcre.org/pcre2/code/trunk/src/pcre2_internal.h?r1=600&r2=670&sortby=date
- https://vcs.pcre.org/pcre/code/trunk/pcre_ucd.c?r1=1490&r2=1688&sortby=date
- 97030 vdb-entry
- https://blogs.gentoo.org/ago/2017/03/14/libpcre-invalid-memory-read-in-match-pcre_exec-c/
- https://vcs.pcre.org/pcre2/code/trunk/src/pcre2_ucd.c?r1=316&r2=670&sortby=date
- RHSA-2018:2486 vendor-advisory
- GLSA-201710-25 vendor-advisory