CVE-2016-1836
UnknownEPSS 3.80%
Last modified
CVE-2016-1836 is a vulnerability of currently unknown severity. Use-after-free vulnerability in the xmlDictComputeFastKey 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 cause a denial of service via a crafted XML document.. EPSS estimates a 3.80% chance of exploitation in the next 30 days.
Description
Use-after-free vulnerability in the xmlDictComputeFastKey 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 cause a denial of service via a crafted XML document.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Canonical | Ubuntu Linux | 12.04 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 15.10 |
| Canonical | Ubuntu Linux | 16.04 |
| Debian | Debian Linux | 8.0 |
| Apple | Iphone Os | < 9.3.2 |
| Apple | Mac Os X | < 10.11.5 |
| Apple | Tvos | < 9.2.1 |
| Apple | Watchos | < 2.2.1 |
| Redhat | Enterprise Linux Desktop | 6.0 |
| Redhat | Enterprise Linux Desktop | 7.0 |
| Redhat | Enterprise Linux Server | 6.0 |
| Redhat | Enterprise Linux Server | 7.0 |
| Redhat | Enterprise Linux Server Aus | 7.2 |
| Redhat | Enterprise Linux Server Aus | 7.3 |
| Redhat | Enterprise Linux Server Aus | 7.4 |
| Redhat | Enterprise Linux Server Aus | 7.6 |
| Redhat | Enterprise Linux Server Eus | 7.2 |
| Redhat | Enterprise Linux Server Eus | 7.3 |
| Redhat | Enterprise Linux Server Eus | 7.4 |
| Redhat | Enterprise Linux Server Eus | 7.5 |
| Redhat | Enterprise Linux Server Eus | 7.6 |
| Redhat | Enterprise Linux Server Tus | 7.2 |
| Redhat | Enterprise Linux Server Tus | 7.3 |
| Redhat | Enterprise Linux Server Tus | 7.6 |
| Redhat | Enterprise Linux Workstation | 6.0 |
| Redhat | Enterprise Linux Workstation | 7.0 |
| Xmlsoft | Libxml2 | < 2.9.4 |
| Mcafee | Web Gateway | >= 7.5.0.0, <= 7.5.2.10 |
| Mcafee | Web Gateway | >= 7.6.0.0, <= 7.6.2.3 |
References
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00000.htmlMailing List, Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.htmlMailing List, Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00002.htmlMailing List, Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00003.htmlMailing List, Not Applicable, Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00005.htmlMailing List, Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/May/msg00001.htmlMailing List, Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/May/msg00002.htmlMailing List, Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/May/msg00003.htmlMailing List, Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/May/msg00004.htmlMailing List, Vendor Advisory
- http://rhn.redhat.com/errata/RHSA-2016-2957.htmlThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.htmlThird Party Advisory
- http://www.securityfocus.com/bid/90691Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1035890Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-2994-1Third Party Advisory
- http://xmlsoft.org/news.htmlRelease Notes, Vendor Advisory
- https://access.redhat.com/errata/RHSA-2016:1292Third Party Advisory
- https://bugzilla.gnome.org/show_bug.cgi?id=759398Permissions Required, Third Party Advisory
- https://git.gnome.org/browse/libxml2/commit/?id=45752d2c334b50016666d8f0ec3691e2d680f0a0Patch, Third Party Advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10170Patch, Third Party Advisory
- https://security.gentoo.org/glsa/201701-37Third Party Advisory
- https://support.apple.com/HT206564Vendor Advisory
- https://support.apple.com/HT206566Vendor Advisory
- https://support.apple.com/HT206567Vendor Advisory
- https://support.apple.com/HT206568Vendor Advisory
- https://support.apple.com/HT206899Vendor Advisory
- https://support.apple.com/HT206901Vendor Advisory
- https://support.apple.com/HT206902Vendor Advisory
- https://support.apple.com/HT206903Vendor Advisory
- https://support.apple.com/HT206904Vendor Advisory
- https://support.apple.com/HT206905Vendor Advisory
- https://www.debian.org/security/2016/dsa-3593Third Party Advisory
- https://www.tenable.com/security/tns-2016-18Third Party Advisory
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00000.htmlMailing List, Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.htmlMailing List, Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00002.htmlMailing List, Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00003.htmlMailing List, Not Applicable, Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/Jul/msg00005.htmlMailing List, Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/May/msg00001.htmlMailing List, Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/May/msg00002.htmlMailing List, Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/May/msg00003.htmlMailing List, Vendor Advisory
- http://lists.apple.com/archives/security-announce/2016/May/msg00004.htmlMailing List, Vendor Advisory
- http://rhn.redhat.com/errata/RHSA-2016-2957.htmlThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.htmlThird Party Advisory
- http://www.securityfocus.com/bid/90691Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1035890Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-2994-1Third Party Advisory
- http://xmlsoft.org/news.htmlRelease Notes, Vendor Advisory
- https://access.redhat.com/errata/RHSA-2016:1292Third Party Advisory
- https://bugzilla.gnome.org/show_bug.cgi?id=759398Permissions Required, Third Party Advisory
- https://git.gnome.org/browse/libxml2/commit/?id=45752d2c334b50016666d8f0ec3691e2d680f0a0Patch, Third Party Advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10170Patch, Third Party Advisory
- https://security.gentoo.org/glsa/201701-37Third Party Advisory
- https://support.apple.com/HT206564Vendor Advisory
- https://support.apple.com/HT206566Vendor Advisory
- https://support.apple.com/HT206567Vendor Advisory
- https://support.apple.com/HT206568Vendor Advisory
- https://support.apple.com/HT206899Vendor Advisory
- https://support.apple.com/HT206901Vendor Advisory
- https://support.apple.com/HT206902Vendor Advisory
- https://support.apple.com/HT206903Vendor Advisory
- https://support.apple.com/HT206904Vendor Advisory
- https://support.apple.com/HT206905Vendor Advisory
- https://www.debian.org/security/2016/dsa-3593Third Party Advisory
- https://www.tenable.com/security/tns-2016-18Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2016-1836?
Use-after-free vulnerability in the xmlDictComputeFastKey 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 cause a denial of service via a crafted XML document.
How severe is CVE-2016-1836?
Severity scoring for CVE-2016-1836 is pending analysis. The EPSS model estimates a 3.80% probability of exploitation in the next 30 days.
How do I fix CVE-2016-1836?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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