Is CVE-2015-8394 actively exploited?

CVE-2015-8394 has no public evidence of in-the-wild exploitation as of 2025-04-12.

What is the CVSS score for CVE-2015-8394?

CVE-2015-8394 has a CVSS score of 9.8 (CRITICAL severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2015-8394?

Patch guidance is available from pcre security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2015-8394.

Fix CVE-2015-8394 - CRITICAL

Q: Which products are affected by CVE-2015-8394?

4 products: pcre perl compatible regular expression library, php php, php php, php php.

Description

PCRE before 8.38 mishandles the (?(<digits>) and (?(R<digits>) conditions, which allows remote attackers to cause a denial of service (integer overflow) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-190 · Integer Overflow

Metadata

Primary Vendor: PCRE
Published: 12/2/2015
Last Modified: 4/12/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

pcre : perl_compatible_regular_expression_libraryphp : phpphp : phpphp : php

Remediation Guidance

Executive Summary

Cite this page

CVE-2015-8394. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2015-8394

View on NIST NVD

CVE-2015-8394 vulnerability