The earliest recollection of this bug is traced back to PAN-OS 11.1.6 - July 08, 2026. This bug is fixed in PAN-OS versions 11.1.8, 11.2.7. VM-Series firewalls deployed behind an AWS GWLB might crash and reboot unexpectedly if tunnel sessions are moving through the firewall. Fixed an issue where the firewall rebooted continuously after upgrading to PAN-OS 11.1.5-h1 when a tunnel session was established in a Gateway Load Balancing (GWLB) scenario and no data packet was associated with the packet. For more information: https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-release-notes/pan-os-11-1-6-known-and-addressed-issues/pan-os-11-1-6-known-issues https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-release-notes/pan-os-11-1-8-known-and-addressed-issues/pan-os-11-1-8-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-2/pan-os-release-notes/pan-os-11-2-4-known-and-addressed-issues/pan-os-11-2-4-known-issues https://docs.paloaltonetworks.com/pan-os/11-2/pan-os-release-notes/pan-os-11-2-7-known-and-addressed-issues/pan-os-11-2-7-addressed-issues