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CVE-2016-6262

21
FAUCET Score

CVE-2016-6262 is an out-of-bounds read vulnerability in libidn before version 1.33, affecting products from Canonical, GNU, and openSUSE. This flaw allows remote attackers to potentially extract sensitive memory information by providing a zero byte as input. With a CVSS v3 score of 7.5 (High), it is easily exploitable over the network with low attack complexity and no user interaction required, leading to high confidentiality impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.32CPE matchmatch criteria
cpe:2.3:a:gnu:libidn:*:*:*:*:*:*:*:*
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:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
42.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
6.51%
Probability of exploitation in next 30 days
EPSS Percentile
93.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0651 is in the 88th percentile among its peer group of 51,455 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (3)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libidn
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libidn
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libidn

Vendor Advisories (1)

redhatCVE-2016-6262Low

libidn: Out-of-bounds read when reading zero byte as input

Jan 14, 2016

References

git.savannah.gnu.org / cgit/libidn.git/commit
Issue TrackingPatch
lists.opensuse.org / opensuse-updates/2016-08/msg00005.html
Third Party Advisory
lists.opensuse.org / opensuse-updates/2016-08/msg00098.html
Third Party Advisory
lists.apache.org / thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
lists.apache.org / thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
lists.gnu.org / archive/html/help-libidn/2016-07/msg00009.html
Vendor Advisory
openwall.com / lists/oss-security/2016/07/20/6
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2016/07/21/4
Mailing ListThird Party Advisory
securityfocus.com / bid/92070
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-3068-1
Third Party Advisory