CVE-2026-41227: BIG-IP HTTP/2 Layer 7 Dos Protection vulnerability

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-13 · updated 2026-10-26
Weakness: CWE-770

Description

On an HTTP/2 virtual server with Layer 7 DoS Protection configured, undisclosed traffic can result in an increase in memory consumption causing the Traffic Management Microkernel (TMM) process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected products

F5 Big-Ip Advanced Web Application Firewall: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 16.1.0 through 16.1.6
BIG-IP ASM: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 16.1.0 through 16.1.6
F5 Big-Ip Ddos Hybrid Defender: from 17.1.0 through 17.1.3; from 17.5.0 through 17.5.1; from 16.1.0 through 16.1.6

References

https://my.f5.com/manage/s/article/K000158979

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