Bug ID 1976001: PEM::session TCL commands can cause cores

Last Modified: Oct 29, 2025

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

Known Affected Versions:
17.5.0, 17.5.1, 17.5.1.2, 17.5.1.3

Opened: Jul 03, 2025

Severity: 3-Major

Symptoms

Tmm cores, with a segmentation fault.

Impact

Traffic disrupted while tmm restarts.

Conditions

Occurs when * PEM::session commands are used in an iRule. * tmm is busy, and the queue_drops field in tmm/cmp stat table is not zero.

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips