Bug ID 1819813: [APM][NTLM]TMM core on null _ntlm_msg on 17.1.x on top of ID1495381

Last Modified: Jul 28, 2025

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

Known Affected Versions:
17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2

Opened: Feb 18, 2025

Severity: 2-Critical

Symptoms

Tmm cores while APM looks up a session.

Impact

Traffic disrupted while tmm restarts.

Conditions

SWG explicit forward proxy with NTLM or Kerberos credentials identification method.

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips