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CVE-2016-1834

26
FAUCET Score

CVE-2016-1834 is a heap-based buffer overflow in the xmlStrncat function of libxml2, affecting Apple iOS, OS X, tvOS, and watchOS, as well as other products from Canonical, Debian, McAfee, and Red Hat. This vulnerability carries a high CVSS score of 7.8, indicating that a remote attacker could execute arbitrary code or cause a denial of service through a crafted XML document, requiring user interaction. Despite its severity, there is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
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:*:*:*
< 9.3.2CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.62%
Probability of exploitation in next 30 days
EPSS Percentile
90.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0462 is in the 91st percentile among its peer group of 11,616 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

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
applevendor investigatingvia nvd_reference
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-2016-1834Important

libxml2: Heap-buffer-overflow in xmlStrncat

May 23, 2016

References

lists.apple.com / archives/security-announce/2016/May/msg00001.html
Mailing ListVendor Advisory
lists.apple.com / archives/security-announce/2016/May/msg00002.html
Mailing ListVendor Advisory
lists.apple.com / archives/security-announce/2016/May/msg00003.html
Mailing ListVendor Advisory
lists.apple.com / archives/security-announce/2016/May/msg00004.html
Mailing ListVendor Advisory
rhn.redhat.com / errata/RHSA-2016-2957.html
Third Party Advisory
access.redhat.com / errata/RHSA-2016:1292
Third Party Advisory
bugzilla.gnome.org / show_bug.cgi
ExploitIssue TrackingThird Party Advisory
git.gnome.org / browse/libxml2/commit
PatchThird Party Advisory
kc.mcafee.com / corporate/index
PatchThird Party Advisory
support.apple.com / HT206564
Vendor Advisory
support.apple.com / HT206566
Vendor Advisory
support.apple.com / HT206567
Vendor Advisory
support.apple.com / HT206568
Vendor Advisory
debian.org / security/2016/dsa-3593
Third Party Advisory
tenable.com / security/tns-2016-18
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/90691
Third Party AdvisoryVDB Entry
securitytracker.com / id/1035890
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2994-1
Third Party Advisory
xmlsoft.org / news.html
Release NotesVendor Advisory