Bug ID 2291277: Limited support for long strings in Login/Logout expected or unexpected string configurations.

Last Modified: Jul 28, 2026

Affected Product(s):
BIG-IP ASM(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, 17.1.3, 17.1.3.1, 17.1.3.2, 17.1.3.4, 17.5.1, 17.5.1.2, 17.5.1.3, 17.5.1.4, 17.5.1.5, 17.5.1.6, 17.5.1.8

Opened: Apr 30, 2026

Severity: 3-Major

Symptoms

Login/Logout expected and unexpected strings are supposed to support up to 1024 characters, but they fail to handle strings of this length.

Impact

After ASM is restarted, the bd process enters a restart loop.

Conditions

Configuring 1024 characters with Login/Logout expected/unexpected string.

Workaround

Use shorter strings for those fields.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips