libpcre1 in PCRE 8.40 and libpcre2 in PCRE2 10.23 allow remote attackers to cause a…
Priority MEDIUM 41CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 1 fixed, 4 without a fix
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.05033 92nd percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 1 fixed, 4 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
Red Hat 1 advisory
- RHSA-2018:2486 Released 2018-08-16 · Red Hat rating ImportantRed Hat JBoss Core Services Apache HTTP Server 2.4.29 security update
- Red Hat JBoss Core Services
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
| Red Hat JBoss Enterprise Web Server 1 | Affected | No fix planned: Will not fix |
| Red Hat JBoss Enterprise Web Server 2 | Affected | No fix planned: Will not fix |
| Red Hat JBoss Enterprise Web Server 3 | Affected | No fix planned: Will not fix |
| Red Hat JBoss Core Services | Fixed | RHSA-2018:2486 |
Not affected: 6 products
- Red Hat Directory Server 8
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat JBoss Web Server 3
- Red Hat Software Collections
Timeline
- 2026-10-02 Threatist record created from CVE-2017-7186
- 2026-10-03 Alias added: GHSA-vrw4-ffp3-c5mv
References
Patch 5
- 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
- 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
More Pcre vulnerabilities
- TI-2017-11950 In PCRE 8.41, after compiling, a pcretest load test PoC produces a crash overflow in the… CVSS 3.1MEDIUM 5.5
- TI-2015-02839 Heap-based buffer overflow in PCRE 8.34 through 8.37 and PCRE2 10.10 allows remote… CVSS 3.1CRITICAL 9.8
- TI-2016-02677 The compile_branch function in pcre_compile.c in PCRE 8.x before 8.39 and pcre2_compile.c… CVSS 3.0CRITICAL 9.8
- TI-2016-01176 The pcre_compile2 function in pcre_compile.c in PCRE 8.38 mishandles the… CVSS 3.1CRITICAL 9.8
- TI-2015-06911 The pcre_compile function in pcre_compile.c in PCRE before 8.38 mishandles certain [… CVSS 3.1CRITICAL 9.8
- TI-2015-04255 Heap-based buffer overflow in the find_fixedlength function in pcre_compile.c in PCRE… CVSS 3.0CRITICAL 9.1
Sources
- CVE-2017-7186 · CVE Program
- CVE-2017-7186 · NVD
- FIRST EPSS
- GHSA-vrw4-ffp3-c5mv · GitHub Advisory Database · CC BY 4.0
- CVE-2017-7186 · Red Hat security data · CC BY 4.0
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