Bug ID 2251813: BIG-IP AFM: mcpd may crash when modifying address lists with cyclic nested references

Last Modified: May 05, 2026

Affected Product(s):
BIG-IP AFM(all modules)

Known Affected Versions:
17.5.1.3, 17.5.1.4, 17.5.1.5

Fixed In:
17.5.1.6, 17.1.3.2

Opened: Mar 18, 2026

Severity: 3-Major

Symptoms

Modifying an address list (such as adding or deleting an entry) can cause mcpd to crash with a segmentation fault (SIGSEGV).

Impact

Mcpd process crashes. Traffic disrupted while mcpd restarts.

Conditions

Address lists are configured with nested references.

Workaround

Review and correct address list configurations to ensure no cycles exist

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips