Is CVE-2014-6438 in the CISA KEV catalog?

No. CVE-2014-6438 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2014-6438?

CVE-2014-6438 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2014-6438?

CVE-2014-6438 has an EPSS score of 4.13% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2014-6438?

Upgrade ruby4 on rhel 8 to 0-main@aarch64 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2014-6438

HIGHEPSS 90th pctl

7.5

CVSS v3

NVD

Description

The URI.decode_www_form_component method in Ruby before 1.9.2-p330 allows remote attackers to cause a denial of service (catastrophic regular expression backtracking, resource consumption, or application crash) via a crafted string.

CWE-399Resource Management Errors

How to fix

Remediation Available

ruby4Red Hat / RHEL

Fixed in:0-main@aarch64RHSA-2026:8838

Fixed in:0-main@srcRHSA-2026:8838

Fixed in:0-main@x86_64RHSA-2026:8838

Fixed in:0-main@noarchRHSA-2026:8838

ruby4Rocky

Fixed in:0-main@aarch64RHSA-2026:8838

Fixed in:0-main@srcRHSA-2026:8838

Fixed in:0-main@x86_64RHSA-2026:8838

Fixed in:0-main@noarchRHSA-2026:8838

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

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

4.13%probability of exploitation in 30 days

90thpercentile

Elevated risk: more likely to be exploited than 90% of all known CVEs.

References

Patch1

ruby-lang.org

Third-Party Advisory2

Mailing List1

openwall.com

Related Vulnerabilities

Other CWE-399 (Resource Management Errors) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2009-3103	High	10.0	90%	-	-
CVE-2009-0075	High	9.3	85%	-	-
CVE-2005-1790	Low	2.6	83%	-	-
CVE-2010-0806	High	8.8	82%	KEV	-
CVE-2009-2526	High	7.8	82%	-	-
CVE-2015-1868	High	7.8	82%	-	Fix

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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 2026-05-13.