CVE-2016-6884: TLS cipher suites with CBC mode in TLS 1.1 and 1.2 in MatrixSSL before 3.8.3 allow remote attackers to caus...

Security readout for executives and security teams

CVE-2016-6884 is a denial-of-service issue in MatrixSSL before 3.8.3 when using CBC cipher suites in TLS 1.1 or 1.2. A remote attacker could send a crafted TLS message that triggers an out-of-bounds read and disrupts service availability. Exposure is most likely in internet-facing or network-accessible services that embed MatrixSSL before 3.8.3 and still negotiate TLS 1.1/1.2 CBC cipher suites. Confirm through dependency inventory and TLS configuration review. Treat as a targeted availability risk for systems using outdated MatrixSSL. Prioritize verification where affected TLS services are internet-facing or business-critical. No evidence in the supplied sources indicates active exploitation. Mitigation focus: Confirm whether any products embed MatrixSSL before 3.8.3.; Check MatrixSSL vendor change notes and upgrade guidance.; Upgrade affected MatrixSSL deployments to 3.8.3 or later where supported..

Prepared

Jun 13, 2026, 06:02 UTC (UTC+00:00)

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