CVE-2016-2339

critical

Published 2017-01-06 · Modified 2026-05-06

CVSS v3

9.8

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

CVSS v2

7.5

VIR risk

9.8

Description

An exploitable heap overflow vulnerability exists in the Fiddle::Function.new "initialize" function functionality of Ruby. In Fiddle::Function.new "initialize" heap buffer "arg_types" allocation is made based on args array length. Specially constructed object passed as element of args array can increase this array size after mentioned allocation and cause heap overflow.

Predictions

Exploit likelihood

97%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2016-2339.html

OS impact

OS	Version	Status	Fixed in
sles		affected

Application impact

Vendor	Product	Versions	Fixed
ruby-lang	ruby	`2.2.2`
ruby-lang	ruby	`2.3.0`

References

https://www.suse.com/security/cve/CVE-2016-2339.html
http://www.securityfocus.com/bid/91234
http://www.talosintelligence.com/reports/TALOS-2016-0034/
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html

CWEs

CWE-119

Verify integrity in audit chain (admin only). AS-IS.