High severity7.8NVD Advisory· Published May 20, 2016· Updated Jun 17, 2026

CVE-2016-1840

Description

Heap-based buffer overflow in the xmlFAParsePosCharGroup function in libxml2 before 2.9.4, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted XML document.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

McAfee/Web Gateway
cpe:2.3:a:mcafee:web_gateway:*:*:*:*:*:*:*:*
Range: >=7.5.0.0,<=7.5.2.10
Xmlsoft/Libxml22 versions
cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*range: <2.9.4
- (no CPE)range: <2.9.4
Apple Inc./Iphone OS
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
Range: <9.3.2
Apple Inc./Mac OS X
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
Range: <10.11.5
Apple Inc./tvOS
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
Range: <9.2.1
Apple Inc./watchOS
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
Range: <2.2.1
Canonical/Ubuntu Linux4 versions
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*+ 3 more
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
Debian/linux
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
Red Hat/Enterprise Linux Desktop2 versions
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
Red Hat/Enterprise Linux Server2 versions
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
Red Hat/Enterprise Linux Server Aus4 versions
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:*+ 3 more
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*
Red Hat/Enterprise Linux Eus5 versions
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.2:*:*:*:*:*:*:*+ 4 more
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.2:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*
Red Hat/Enterprise Linux Server Tus3 versions
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.2:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:redhat:enterprise_linux_server_tus:7.2:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*
Red Hat/Enterprise Linux Workstation2 versions
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
osv-coords33 versions
pkg:rpm/opensuse/libxml2&distro=openSUSE%20Tumbleweed pkg:rpm/opensuse/python-libxml2&distro=openSUSE%20Tumbleweed pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Desktop%2012 pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP1 pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP2-LTSS pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSS pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-TERADATA pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4 pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2012 pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1 pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4 pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012 pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1 pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2011%20SP4 pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012 pkg:rpm/suse/libxml2&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP1 pkg:rpm/suse/libxml2&distro=SUSE%20Manager%202.1 pkg:rpm/suse/libxml2&distro=SUSE%20Manager%20Proxy%202.1 pkg:rpm/suse/libxml2&distro=SUSE%20OpenStack%20Cloud%205 pkg:rpm/suse/libxml2-python&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP2-LTSS pkg:rpm/suse/libxml2-python&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSS pkg:rpm/suse/libxml2-python&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-TERADATA pkg:rpm/suse/libxml2-python&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4 pkg:rpm/suse/libxml2-python&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4 pkg:rpm/suse/libxml2-python&distro=SUSE%20Manager%202.1 pkg:rpm/suse/libxml2-python&distro=SUSE%20Manager%20Proxy%202.1 pkg:rpm/suse/libxml2-python&distro=SUSE%20OpenStack%20Cloud%205 pkg:rpm/suse/python-libxml2&distro=SUSE%20Linux%20Enterprise%20Desktop%2012 pkg:rpm/suse/python-libxml2&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP1 pkg:rpm/suse/python-libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2012 pkg:rpm/suse/python-libxml2&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1 pkg:rpm/suse/python-libxml2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012 pkg:rpm/suse/python-libxml2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1
< 2.9.4-1.22+ 32 more
- (no CPE)range: < 2.9.4-1.22
- (no CPE)range: < 2.9.4-1.4
- (no CPE)range: < 2.9.1-24.1
- (no CPE)range: < 2.9.1-24.1
- (no CPE)range: < 2.7.6-0.44.1
- (no CPE)range: < 2.7.6-0.44.1
- (no CPE)range: < 2.7.6-0.44.1
- (no CPE)range: < 2.7.6-0.44.1
- (no CPE)range: < 2.9.1-24.1
- (no CPE)range: < 2.9.1-24.1
- (no CPE)range: < 2.7.6-0.44.1
- (no CPE)range: < 2.9.1-24.1
- (no CPE)range: < 2.9.1-24.1
- (no CPE)range: < 2.7.6-0.44.1
- (no CPE)range: < 2.9.1-24.1
- (no CPE)range: < 2.9.1-24.1
- (no CPE)range: < 2.7.6-0.44.1
- (no CPE)range: < 2.7.6-0.44.1
- (no CPE)range: < 2.7.6-0.44.1
- (no CPE)range: < 2.7.6-0.44.4
- (no CPE)range: < 2.7.6-0.44.4
- (no CPE)range: < 2.7.6-0.44.4
- (no CPE)range: < 2.7.6-0.44.4
- (no CPE)range: < 2.7.6-0.44.4
- (no CPE)range: < 2.7.6-0.44.4
- (no CPE)range: < 2.7.6-0.44.4
- (no CPE)range: < 2.7.6-0.44.4
- (no CPE)range: < 2.9.1-24.1
- (no CPE)range: < 2.9.1-24.1
- (no CPE)range: < 2.9.1-24.1
- (no CPE)range: < 2.9.1-24.1
- (no CPE)range: < 2.9.1-24.1
- (no CPE)range: < 2.9.1-24.1

Patches

Vulnerability mechanics

References

git.gnome.org/browse/libxml2/commit/nvdPatchThird Party Advisory
kc.mcafee.com/corporate/indexnvdPatchThird Party Advisory
bugzilla.gnome.org/show_bug.cginvdExploitIssue TrackingThird Party Advisory
lists.apple.com/archives/security-announce/2016/May/msg00001.htmlnvdMailing ListVendor Advisory
lists.apple.com/archives/security-announce/2016/May/msg00002.htmlnvdMailing ListVendor Advisory
lists.apple.com/archives/security-announce/2016/May/msg00003.htmlnvdMailing ListVendor Advisory
lists.apple.com/archives/security-announce/2016/May/msg00004.htmlnvdMailing ListVendor Advisory
rhn.redhat.com/errata/RHSA-2016-2957.htmlnvdThird Party Advisory
www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.htmlnvdThird Party Advisory
www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.htmlnvdThird Party Advisory
www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlnvdThird Party Advisory
www.securityfocus.com/bid/90691nvdThird Party AdvisoryVDB Entry
www.securitytracker.com/id/1035890nvdThird Party AdvisoryVDB Entry
www.ubuntu.com/usn/USN-2994-1nvdThird Party Advisory
xmlsoft.org/news.htmlnvdRelease NotesVendor Advisory
access.redhat.com/errata/RHSA-2016:1292nvdThird Party Advisory
security.gentoo.org/glsa/201701-37nvdThird Party Advisory
support.apple.com/HT206564nvdVendor Advisory
support.apple.com/HT206566nvdVendor Advisory
support.apple.com/HT206567nvdVendor Advisory
support.apple.com/HT206568nvdVendor Advisory
www.debian.org/security/2016/dsa-3593nvdThird Party Advisory
www.tenable.com/security/tns-2016-18nvdThird Party Advisory

News mentions

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cvss	0.507
epss	0.003
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000