Bug ID 2185281: Per-request policy variable assignment of perflow.category_lookup.result.primarycategory may lead to crash

Last Modified: May 05, 2026

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

Known Affected Versions:
17.5.1, 17.5.1.2, 17.5.1.3, 17.5.1.4, 17.5.1.5, 17.5.1.6

Opened: Dec 12, 2025

Severity: 3-Major

Symptoms

Assigning a value larger than 4096 to perflow.category_lookup.result.primarycategory may lead to a TMM crash.

Impact

Traffic disrupted while tmm restarts.

Conditions

-- Per-request policy -- Assign the variable perflow.category_lookup.result.primarycategory an incompatible value

Workaround

Do not assign a value to perflow.category_lookup.result.primarycategory larger than 4096.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips