Last Modified: Sep 02, 2026
Affected Product(s):
BIG-IP TMOS
Fixed In:
17.5.1.9
Opened: Apr 21, 2026 Severity: 3-Major
When a second IPS signature update is loaded while the IPS daemon is still compiling signatures from a previous update, traffic that matches signature-based inspection rules passes through without being inspected
Traffic that would typically be blocked or rejected by signature-based IPS rules goes uninspected
A virtual server has an IPS profile that includes signature-based inspection rules attached to it A signature update is loaded. While the profile status shows "Signature compilation...", a second signature update is loaded before the first compilation completes
Before loading a new signature update, verify that all IPS profiles have reached Ready status
None