Last Modified: Jul 18, 2026
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
12.0.0, 12.0.0 hf1, 12.0.0 hf2, 12.0.0 hf3, 12.0.0 hf4, 12.1.0, 12.1.0 hf1, 12.1.0 hf2, 12.1.1, 12.1.1 hf1, 12.1.1 hf2, 12.1.2, 12.1.2 hf1, 12.1.2 hf2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 13.0.0, 13.0.0 hf1, 13.0.0 hf2, 13.0.0 hf3, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3
Fixed In:
14.0.0, 13.1.0.4, 12.1.3.6
Opened: Dec 14, 2017 Severity: 3-Major
TMM may crash when upgrading an HTTP/1.1 connection to an HTTP/2 connnection.
TMM crash, leading to a failover event.
-- HTTP/2 gateway enabled. -- Pool member supports protocol switching.
There is no workaround other than removing the HTTP/2 profile from the virtual server.
TMM properly handles protocol upgrade requests from pool members when HTTP/2 is enabled, so no crash occurs.