Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5
Fixed In:
12.0.0, 11.6.0 HF6, 11.5.3 HF2, 11.4.1 HF10
Opened: May 05, 2015 Severity: 2-Critical
TMM crashes with assertion "valid pcb" in tcp4.c
Intermittent crash under load. Traffic disrupted while tmm restarts.
Virtual server with request-adapt or response-adapt profile. Congested client or TCP small window (flow-control is active). Multiple HTTP requests in a single client connection. More likely with iRules that park.
None
Assertion "valid pcb" does not occur.