CVE-2019-6671

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-11-27 · updated 2026-06-17
Weakness: CWE-401

Description

On BIG-IP 15.0.0-15.0.1, 14.1.0-14.1.2, 14.0.0-14.0.1, and 13.1.0-13.1.3.1, under certain conditions tmm may leak memory when processing packet fragments, leading to resource starvation.

Affected products

F5 BIG-IP APM: from 13.1.0 through 13.1.3.1; from 14.0.0 through 14.0.1; from 14.1.0 through 14.1.2; from 15.0.0 through 15.0.1
BIG-IP: from 13.1.0 through 13.1.3.1; from 14.0.0 through 14.0.1; from 14.1.0 through 14.1.2; from 15.0.0 through 15.0.1
F5 Big-Ip Analytics: from 13.1.0 through 13.1.3.1; from 14.0.0 through 14.0.1; from 14.1.0 through 14.1.2; from 15.0.0 through 15.0.1
F5 Networks, Inc. BIG-IP (AAM): from 13.1.0 through 13.1.3.1; from 14.0.0 through 14.0.1; from 14.1.0 through 14.1.2; from 15.0.0 through 15.0.1
BIG-IP ASM: from 13.1.0 through 13.1.3.1; from 14.0.0 through 14.0.1; from 14.1.0 through 14.1.2; from 15.0.0 through 15.0.1
F5 BIG-IP DNS: from 13.1.0 through 13.1.3.1; from 14.0.0 through 14.0.1; from 14.1.0 through 14.1.2; from 15.0.0 through 15.0.1
F5 Big-Ip Edge Gateway: from 13.1.0 through 13.1.3.1; from 14.0.0 through 14.0.1; from 14.1.0 through 14.1.2; from 15.0.0 through 15.0.1
F5 Big-Ip Fraud Protection Service: from 13.1.0 through 13.1.3.1; from 14.0.0 through 14.0.1; from 14.1.0 through 14.1.2; from 15.0.0 through 15.0.1
F5 Big-Ip Global Traffic Manager: from 13.0.0 through 13.1.3.1; from 14.0.0 through 14.0.1; from 14.1.0 through 14.1.2; from 15.0.0 through 15.0.1
F5 Big-Ip Link Controller: from 13.1.0 through 13.1.3.1; from 14.0.0 through 14.0.1; from 14.1.0 through 14.1.2; from 15.0.0 through 15.0.1
F5 BIG-IP (LTM): from 13.1.0 through 13.1.3.1; from 14.0.0 through 14.0.1; from 14.1.0 through 14.1.2; from 15.0.0 through 15.0.1
F5 Networks, Inc. BIG-IP (PEM): from 13.1.0 through 13.1.3.1; from 14.0.0 through 14.0.1; from 14.1.0 through 14.1.2; from 15.0.0 through 15.0.1
F5 Big-Ip Webaccelerator: from 13.1.0 through 13.1.3.1; from 14.0.0 through 14.0.1; from 14.1.0 through 14.1.2; from 15.0.0 through 15.0.1

References

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