Last Modified: Oct 12, 2026
Affected Product(s):
BIG-IP APM, Install/Upgrade
Known Affected Versions:
17.5.1.6, 17.5.1.8, 17.5.1.9
Opened: Jun 23, 2026 Severity: 2-Critical Related Article:
K000162055
After upgrading to version 17.5.1.6 Build 0.67.25 (EHF), some users are prompted to re-enter their credentials for Kerberos authentication. In /var/log/apm: err apmd[14955]: 01490000:3: HTTPParser.cpp func: "parseHttpGenericHeader()" line: 608 Msg: HTTP header line too long (10289 bytes), dropping.
Kerberos enduser logon fails, errors are logged.
APM is configured to use Kerberos authentication
None
None