CVE-2015-7551

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.

Published: 2016-03-23 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-7551 is rated Moderate Risk (47.4/100): CVSS High severity, with low exploitation likelihood (EPSS 0.50%). Review affected assets and schedule remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2015-7551

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 2026-06-15 0.17% 0.50% +0.33%
2 2026-01-16 0.11% 0.17% +0.06%
3 2025-08-19 — 0.11% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-7551

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.4 3.0 HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.5 5.9 [email protected]
4.6 2.0 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
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.
 3.9 6.4 [email protected]

Weakness enumeration for CVE-2015-7551

OS Trackers for CVE-2015-7551

vendor priority summary link
redhat low — https://access.redhat.com/security/cve/CVE-2015-7551
suse medium CVE-2015-7551 severity moderate: SUSE including 26 source package names (4.0.0:libruby2_1-2_1-2.1.9-15.1, 4.0.0:ruby2.1-2.1.9-15.1, …), 139 product×package rows across 49 product lines (Container caasp/v4/velum, Image SLES12-SP5-Azure-BYOS, … (49 product lines)): Fixed 139. https://www.suse.com/security/cve/CVE-2015-7551/
ubuntu low CVE-2015-7551 low priority: Ubuntu including 5 source packages (ruby1.9.1, ruby2.0, ruby2.1, ruby2.2, ruby2.3), 40 status rows across 8 suites (precise, trusty, upstream, vivid, wily, xenial, yakkety, zesty): DNE 26, ignored 5, needs-triage 3, not-affected 3, released 3. https://ubuntu.com/security/CVE-2015-7551

Affected software / configurations for CVE-2015-7551

Vendor Product Version Raw CPE
apple mac_os_x <= 10.11.3 cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
ruby-lang ruby <= 2.0.0-p647 cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
ruby-lang ruby 2.1.0 cpe:2.3:a:ruby-lang:ruby:2.1.0:*:*:*:*:*:*:*
ruby-lang ruby 2.1.1 cpe:2.3:a:ruby-lang:ruby:2.1.1:*:*:*:*:*:*:*
ruby-lang ruby 2.1.2 cpe:2.3:a:ruby-lang:ruby:2.1.2:*:*:*:*:*:*:*
ruby-lang ruby 2.1.3 cpe:2.3:a:ruby-lang:ruby:2.1.3:*:*:*:*:*:*:*
ruby-lang ruby 2.1.4 cpe:2.3:a:ruby-lang:ruby:2.1.4:*:*:*:*:*:*:*
ruby-lang ruby 2.1.5 cpe:2.3:a:ruby-lang:ruby:2.1.5:*:*:*:*:*:*:*
ruby-lang ruby 2.1.6 cpe:2.3:a:ruby-lang:ruby:2.1.6:*:*:*:*:*:*:*
ruby-lang ruby 2.1.7 cpe:2.3:a:ruby-lang:ruby:2.1.7:*:*:*:*:*:*:*
ruby-lang ruby 2.2.0 cpe:2.3:a:ruby-lang:ruby:2.2.0:*:*:*:*:*:*:*
ruby-lang ruby 2.2.1 cpe:2.3:a:ruby-lang:ruby:2.2.1:*:*:*:*:*:*:*
ruby-lang ruby 2.2.2 cpe:2.3:a:ruby-lang:ruby:2.2.2:*:*:*:*:*:*:*
ruby-lang ruby 2.2.3 cpe:2.3:a:ruby-lang:ruby:2.2.3:*:*:*:*:*:*:*

References for CVE-2015-7551

cvelogic Threat Intelligence