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CVE-2016-4447

35
FAUCET Score

CVE-2016-4447 is a denial-of-service vulnerability affecting libxml2 versions prior to 2.9.4, impacting various products from vendors like Apple, Oracle, and Microsoft. The vulnerability stems from a heap-based buffer underread in the xmlParseElementDecl function, triggered by a crafted file. With a CVSS score of 7.5 (HIGH), this vulnerability is easily exploitable over a network with low attack complexity and no user interaction, leading to application crashes. Despite its severity, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.0CPE matchmatch criteria
cpe:2.3:a:hp:icewall_federation_agent:3.0:*:*:*:*:*:*:*
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:*:*:*
15.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*

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:N/I:N/A:H

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

Exploit Intelligence

EPSS Score
13.98%
Probability of exploitation in next 30 days
EPSS Percentile
96.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.1398 is in the 94th percentile among its peer group of 51,466 CVEs.

Social Chatter

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

Patch Available

Vendor Patches (5)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libxml2-0:2.7.6-21.el6_8.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libxml2-0:2.9.1-6.el7_2.3
View patch
redhatpatch availablevia redhat_api
Product: Text-Only JBCS
View patch
redhatno patchvia redhat_api
Product: Red Hat JBoss Enterprise Web Server 3Fixed in: libxml2
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libxml2

Vendor Advisories (1)

redhatCVE-2016-4447Moderate

libxml2: Heap-based buffer underreads due to xmlParseName

May 23, 2016

References

lists.apple.com / archives/security-announce/2016/Jul/msg00000.html
Mailing ListThird Party Advisory
lists.apple.com / archives/security-announce/2016/Jul/msg00001.html
Mailing ListThird Party Advisory
lists.apple.com / archives/security-announce/2016/Jul/msg00002.html
Mailing ListThird Party Advisory
lists.apple.com / archives/security-announce/2016/Jul/msg00003.html
Mailing ListNot Applicable
lists.apple.com / archives/security-announce/2016/Jul/msg00005.html
Mailing ListThird Party Advisory
rhn.redhat.com / errata/RHSA-2016-2957.html
Third Party Advisory
access.redhat.com / errata/RHSA-2016:1292
Third Party Advisory
git.gnome.org / browse/libxml2/commit
PatchThird Party Advisory
h20566.www2.hpe.com / portal/site/hpsc/public/kb/docDisplay
Third Party Advisory
kc.mcafee.com / corporate/index
PatchThird Party Advisory
support.apple.com / HT206899
Third Party Advisory
support.apple.com / HT206901
Third Party Advisory
support.apple.com / HT206902
Third Party Advisory
support.apple.com / HT206903
Third Party Advisory
support.apple.com / HT206904
Third Party Advisory
support.apple.com / HT206905
Third Party Advisory
debian.org / security/2016/dsa-3593
Third Party Advisory
tenable.com / security/tns-2016-18
Third Party Advisory
openwall.com / lists/oss-security/2016/05/25/2
Mailing ListThird Party Advisory
oracle.com / technetwork/topics/security/bulletinjul2016-3090568.html
Third Party Advisory
oracle.com / technetwork/topics/security/linuxbulletinjul2016-3090544.html
Third Party Advisory
oracle.com / technetwork/topics/security/ovmbulletinjul2016-3090546.html
Third Party Advisory
securityfocus.com / bid/90864
Third Party AdvisoryVDB Entry
securitytracker.com / id/1036348
Third Party AdvisoryVDB Entry
slackware.com / security/viewer.php
ExploitMailing ListThird Party Advisory
ubuntu.com / usn/USN-2994-1
Third Party Advisory
xmlsoft.org / news.html
Release NotesVendor Advisory