The earliest recollection of this bug is traced back to PAN-OS 11.1.10-h12 - December 17, 2025. This bug is fixed in PAN-OS versions 11.1.10-h12, 12.1.4, 11.1.12, 11.1.13-h1. Fixed an issue where firewalls experienced multiple reboots due to the pan_task process restarting with a SIGSEGV signal. This occurred because the client-to-firewall side assumed TLS 1.3 for the firewall-server side. For more information: https://docs.paloaltonetworks.com/ngfw/release-notes/12-1/pan-os-12-1-4-known-and-addressed-issues/pan-os-12-1-4-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-release-notes/pan-os-11-1-10-known-and-addressed-issues/pan-os-11-1-10-h12-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-release-notes/pan-os-11-1-12-known-and-addressed-issues/pan-os-11-1-12-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-h1-addressed-issues