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CVE-2016-1835

23
FAUCET Score

CVE-2016-1835 is a use-after-free vulnerability in the libxml2 library (specifically the xmlSAX2AttributeNs function) affecting Apple iOS before 9.3.2 and OS X before 10.11.5, as well as other products using libxml2. This vulnerability carries a high CVSS score of 8.8, indicating a critical risk due to its network-based attack vector, low attack complexity, and potential for high impact on confidentiality, integrity, and availability. While it can lead to a denial of service, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant 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:*:*:*
<= 9.3.1CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
5.13%
Probability of exploitation in next 30 days
EPSS Percentile
91.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0513 is in the 91st percentile among its peer group of 14,855 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 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 0.1 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-2016-1835Moderate

libxml2: Heap use-after-free in xmlSAX2AttributeNs

May 23, 2016

References

lists.apple.com / archives/security-announce/2016/May/msg00002.html
Vendor Advisory
lists.apple.com / archives/security-announce/2016/May/msg00004.html
Vendor Advisory
rhn.redhat.com / errata/RHSA-2016-2957.html
access.redhat.com / errata/RHSA-2016:1292
bugzilla.gnome.org / show_bug.cgi
git.gnome.org / browse/libxml2/commit
kc.mcafee.com / corporate/index
support.apple.com / HT206567
Vendor Advisory
support.apple.com / HT206568
Vendor Advisory
debian.org / security/2016/dsa-3593
tenable.com / security/tns-2016-18
oracle.com / technetwork/topics/security/bulletinjul2016-3090568.html
oracle.com / technetwork/topics/security/linuxbulletinjul2016-3090544.html
oracle.com / technetwork/topics/security/ovmbulletinjul2016-3090546.html
securityfocus.com / bid/90696
securitytracker.com / id/1035890
ubuntu.com / usn/USN-2994-1
xmlsoft.org / news.html