CVE-2015-2327

Exp

PCRE before 8.36 mishandles the /(((a\2)|(a*)\g<-1>))*/ pattern and related patterns with certain internal recursive back references, which allows remote attackers to cause a denial of service (segmentation fault) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

Published: 2015-12-02 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-2327 is rated High Exploit Risk (73.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.82%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2015-2327

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2015-2327

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-23 4.83% 2.82% -2.01%
2 2026-03-10 5.33% 4.83% -0.50%
3 2025-12-07 — 5.33% —

Full EPSS history (15 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-2327

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2015-2327

OS Trackers for CVE-2015-2327

vendor priority summary link
debian low CVE-2015-2327 low priority: Debian including 1 source packages (pcre3), 2 status rows across 2 suites (bookworm, bullseye): resolved 2. https://security-tracker.debian.org/tracker/CVE-2015-2327
redhat medium — https://access.redhat.com/security/cve/CVE-2015-2327
suse medium CVE-2015-2327 severity moderate: SUSE including 41 source package names (0.9.1:libpcre1-8.39-7.1, 1.0.0:libpcre1-8.39-7.1, …), 162 product×package rows across 73 product lines (Container caasp/v4/default-http-backend, Container caasp/v4/dnsmasq-nanny, … (73 product lines)): Fixed 145, Known Not Affected 17. https://www.suse.com/security/cve/CVE-2015-2327/
ubuntu low CVE-2015-2327 low priority: Ubuntu including 3 source packages (mongodb, pcre2, pcre3), 24 status rows across 8 suites (precise, trusty, upstream, vivid, wily, xenial, yakkety, zesty): not-affected 15, DNE 4, released 4, ignored 1. https://ubuntu.com/security/CVE-2015-2327

Affected software / configurations for CVE-2015-2327

Vendor Product Version Raw CPE
pcre perl_compatible_regular_expression_library <= 8.35 cpe:2.3:a:pcre:perl_compatible_regular_expression_library:*:*:*:*:*:*:*:*

References for CVE-2015-2327

cvelogic Threat Intelligence