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CVE-2012-6656

21
FAUCET Score

CVE-2012-6656 is an out-of-bounds read vulnerability in the GNU C Library (glibc) versions prior to 2.16, specifically affecting the iconvdata/ibm930.c component. This flaw allows remote attackers to trigger a denial of service by providing a specially crafted multibyte character value of "0xffff" to the iconv function when converting IBM930 encoded data to UTF-8. With a CVSS score of 5.0 (AV:N/AC:L/Au:N/C:N/I:N/A:P), this vulnerability is of medium severity, requiring no authentication and having a low attack complexity, but only leading to a partial denial of service. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
10.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:lts:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
14.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.44%
Probability of exploitation in next 30 days
EPSS Percentile
87.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0344 is in the 83rd percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2012-6656Moderate

glibc: crash in IBM930 decoding

May 23, 2012

References

security.gentoo.org / glsa/201503-04
sourceware.org / bugzilla/show_bug.cgi
ExploitIssue Tracking
sourceware.org / git
debian.org / security/2015/dsa-3142
Third Party Advisory
mandriva.com / security/advisories
Broken Link
openwall.com / lists/oss-security/2014/08/29/3
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2014/09/02/1
Mailing ListThird Party Advisory
securityfocus.com / bid/69472
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2432-1
Third Party Advisory