Last Modified: Jul 18, 2026
Affected Product(s):
BIG-IP APM, Install/Upgrade
Known Affected Versions:
11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 11.6.0 hf5, 11.6.0 hf6, 11.6.0 hf7, 11.6.0 hf8, 11.6.1, 11.6.1 hf1, 11.6.1 hf2, 11.6.2, 11.6.2 hf1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.0.0, 12.0.0 hf1, 12.0.0 hf2, 12.0.0 hf3, 12.0.0 hf4
Fixed In:
12.1.0
Opened: Sep 15, 2015 Severity: 3-Major
if /etc/krb5.conf edited manually the automated patching for the configuration file may behave wrong. For example, if file is cleaned up OR section [realms] deleted, then automated patching for the file will add realms records with each apd process restart /etc/krb5.conf grows in size with each apd process restart as a result krb5 library takes too long to parse the file and bigip stops processing requests
users cannot login if /etc/krb5.conf file size increased significantly. library cannot parse the file
/etc/krb5.conf file modified manually
Restore original default /etc/krb5.conf file. it will be patched properly at next apd process restart
krb5 patching functionality has been fixed.