Last Modified: Jul 28, 2026
Affected Product(s):
BIG-IP TMOS
Fixed In:
21.1.0.1, 17.5.1.8, 17.1.3.4
Opened: Jan 28, 2026 Severity: 2-Critical
A core file similar to the following is generated: chmand.bld0.0.<build>.core.gz Crash signature: SIGSEGV (Segmentation fault) Seen in: publish_system_information() hal_mcpif.cpp std::auto_ptr<Publisher>::operator->()
The issue results in a chmand process crash and generates a core file during system initialization. While no consistent functional outage has been reported after the system completes booting, the crash during the initialization phase presents a potential system stability concern.
- Occurs intermittently during: System boot ISO installation HA (High Availability) creation - Observed across multiple branches: 21.1.x 21.0.x 17.5.x 17.1.x - Trigger scenarios include: Installation of BIG-IP image HA setup initiation BVT / automation pipelines execution
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