Is CVE-2015-7551 in the CISA KEV catalog?

No. CVE-2015-7551 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-7551?

CVE-2015-7551 has a CVSS v3 base score of 8.4 (HIGH).

What is the EPSS score for CVE-2015-7551?

CVE-2015-7551 has an EPSS score of 0.50% (39th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-7551?

Upgrade libruby1.9.1 on ubuntu 14.04 to 1.9.3.484-2ubuntu1.3 or later. Fixes are available for 6 affected products.

CVE & CISA-KEV Catalog

CVE-2015-7551

HIGH

8.4

CVSS v3

NVD

Description

The Fiddle::Handle implementation in ext/fiddle/handle.c in Ruby before 2.0.0-p648, 2.1 before 2.1.8, and 2.2 before 2.2.4, as distributed in Apple OS X before 10.11.4 and other products, mishandles tainting, which allows context-dependent attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted string, related to the DL module and the libffi library. NOTE: this vulnerability exists because of a CVE-2009-5147 regression.

CWE-20Improper Input Validation

How to fix

Remediation Available

libruby1.9.1Ubuntu

Fixed in:1.9.3.484-2ubuntu1.3USN-3365-1

libruby2.0Ubuntu

Fixed in:2.0.0.484-1ubuntu2.4USN-3365-1

libruby2.3Ubuntu

Fixed in:2.3.1-2~16.04.2USN-3365-1

ruby1.9.1Ubuntu

Fixed in:1.9.3.484-2ubuntu1.3USN-3365-1

ruby2.0Ubuntu

Fixed in:2.0.0.484-1ubuntu2.4USN-3365-1

ruby2.3Ubuntu

Fixed in:2.3.1-2~16.04.2USN-3365-1

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 VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.50%probability of exploitation in 30 days

39thpercentile

Low risk: more likely to be exploited than 39% of all known CVEs.

References

Patch1

ruby-lang.org

Vendor Advisory1

support.apple.com

Other references9

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	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 2026-05-06.