Last Modified: May 05, 2026
Affected Product(s):
BIG-IP DNS
Known Affected Versions:
17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 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, 21.0.0, 21.0.0.1
Opened: Apr 15, 2026 Severity: 3-Major
DNS64 may fall back to QTYPE=A if there is a delay in response for QTYPE=AAAA and "DNS IPv6 to IPv4" is set to 'secondary'.
DNS64 could fall back to QTYPE=A
DNS profile with DNS64 "DNS IPv6 to IPv4" is set to 'secondary'. There is a delay in the response for QTYPE=AAAA
NA
None