High severity7.5NVD Advisory· Published May 3, 2019· Updated Jun 17, 2026

CVE-2019-6619

Description

On BIG-IP 14.0.0-14.1.0.1, 13.0.0-13.1.1.4, and 12.1.0-12.1.4, the Traffic Management Microkernel (TMM) may restart when a virtual server has an HTTP/2 profile with Application Layer Protocol Negotiation (ALPN) enabled and it processes traffic where the ALPN extension size is zero.

Affected products

F5, Inc./Big IPllm-fuzzy
Range: 14.0.0-14.1.0.1, 13.0.0-13.1.1.4, and 12.1.0-12.1.4
F5, Inc./Big Ip (ltm, Aam, Afm, Apm, Asm, Link Controller, Pem, Webaccelerator, Websafe)cpe-rescue
Range: 14.0.0-14.1.0.1

Patches

Vulnerability mechanics

References

www.securityfocus.com/bid/108190nvdBroken LinkThird Party AdvisoryVDB Entry
support.f5.com/csp/article/K94563344nvdVendor Advisory

News mentions

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