CVE-2016-1837: Multiple use-after-free vulnerabilities in the (1) htmlPArsePubidLiteral and (2) htmlParseSystemiteral func...

Security readout for executives and security teams

CVE-2016-1837 is a libxml2 memory-safety flaw that can let a remote attacker crash affected software by supplying a crafted XML document. The public record describes denial of service, not confirmed code execution. It matters because libxml2 is widely embedded in operating systems and applications that parse XML. Most exposure is in systems, appliances, or applications using libxml2 before 2.9.4 to parse attacker-controlled XML, plus Apple platforms before the listed fixed releases. Packaged Linux distributions may be affected until vendor security updates are applied. Treat this as a patch hygiene and availability risk. Prioritize externally exposed XML-processing services, managed device fleets, and older embedded systems. Urgency rises where XML input can be supplied by unauthenticated users or business partners. Mitigation focus: Upgrade libxml2 to 2.9.4 or a vendor-fixed package.; Apply Apple updates beyond iOS 9.3.2, OS X 10.11.5, tvOS 9.2.1, and watchOS 2.2.1.; Apply relevant Debian, Ubuntu, Red Hat, Oracle, or other vendor advisories..

Prepared

Jun 13, 2026, 14:22 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.