CVE-2019-6596

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-03-13 · updated 2026-06-17

Description

In BIG-IP 14.0.0-14.0.0.2, 13.0.0-13.1.1.1, 12.1.0-12.1.3.6, 11.6.1-11.6.3.2, or 11.5.1-11.5.8, when processing fragmented ClientHello messages in a DTLS session TMM may corrupt memory eventually leading to a crash. Only systems offering DTLS connections via APM are impacted.

Affected products

F5 BIG-IP APM: from 11.5.1 through 11.5.8; from 11.6.1 through 11.6.3; from 12.1.0 through 12.1.3; from 13.0.0 through 13.1.1; 14.0.0

References

http://www.securityfocus.com/bid/107403
https://support.f5.com/csp/article/K97241515
http://www.securityfocus.com/bid/107403
https://support.f5.com/csp/article/K97241515

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