BIG-IP
CVE-2026-41227: BIG-IP HTTP/2 Layer 7 Dos Protection vulnerability
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.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| BIG-IP 21.0 | Not affected |
| BIG-IP 17.5 | 17.5.1.4 or later |
| BIG-IP 17.1 | 17.1.3.1 or later |
| BIG-IP 16.1 | * or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 12 Oct 2026.