Disclaimer

Known affected versions were inferred from fixed-version data and were not explicitly confirmed by the vendor: 11.1.12, 11.2.9, 12.1.4-h2

The earliest recollection of this bug is traced back to PAN-OS 11.1.13 - October 25, 2026. This bug is fixed in PAN-OS versions 11.2.10, 11.1.13, 11.2.11, 11.1.14, 12.1.5. ( Firewalls in active/active HA configurations only ) Fixed an issue where return packets from a phone gateway looped between the HA pair instead of being encapsulated into the GlobalProtect tunnel. This occurred when the inner session and the outer IPSec tunnel terminated on different nodes, which led to excessive retries and packet drops. For more information: https://docs.paloaltonetworks.com/ngfw/release-notes/12-1/pan-os-12-1-5-known-and-addressed-issues/pan-os-12-1-5-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-release-notes/pan-os-11-1-13-known-and-addressed-issues/pan-os-11-1-13-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-release-notes/pan-os-11-1-14-known-and-addressed-issues/pan-os-11-1-14-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-2/pan-os-release-notes/pan-os-11-2-10-known-and-addressed-issues/pan-os-11-2-10-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-2/pan-os-release-notes/pan-os-11-2-11-known-and-addressed-issues/pan-os-11-2-11-addressed-issues