Is CVE-2015-8389 in the CISA KEV catalog?

No. CVE-2015-8389 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-8389?

CVE-2015-8389 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2015-8389?

CVE-2015-8389 has an EPSS score of 3.89% (89th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-8389?

Upgrade pcre3 on debian 11 to 2:8.38-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2015-8389

CRITICALEPSS 89th pctl

9.8

CVSS v3

NVD

Description

PCRE before 8.38 mishandles the /(?:|a|){100}x/ pattern and related patterns, which allows remote attackers to cause a denial of service (infinite recursion) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

CWE-119Buffer Overflow CWE-185

How to fix

Remediation Available

pcre3Debian

Fixed in:2:8.38-1CVE-2015-8389

libpcre3Ubuntu

Fixed in:1:8.31-2ubuntu2.2USN-2943-1

pcre3Ubuntu

Fixed in:1:8.31-2ubuntu2.2USN-2943-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

3.89%probability of exploitation in 30 days

89thpercentile

Elevated risk: more likely to be exploited than 89% of all known CVEs.

References

Vendor Advisory1

vcs.pcre.org

Third-Party Advisory6

Other references1

security.netapp.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.