Disclaimer

Hotfix versions were inferred because the vendor did not list them explicitly: 11.1.6-h1, 11.1.6-h2, 11.1.6-h3, 11.1.6-h4, 11.1.6-h5, 11.1.6-h6, 11.1.6-h7, 11.1.6-h8, 11.1.6-h9, 11.1.6-h10, 11.1.6-h11, 11.1.6-h12, 11.1.6-h13, 11.1.6-h14, 11.1.6-h15, 11.1.6-h16, 11.1.6-h17, 11.1.6-h18, 11.1.6-h19, 11.1.6-h20, 11.1.6-h21, 11.1.6-h22, 11.1.6-h23, 11.1.6-h24, 11.1.10-h1, 11.1.10-h2, 11.1.10-h3, 11.1.10-h4, 11.1.10-h5, 11.1.10-h6, 11.1.10-h7, 11.1.10-h8, 11.1.10-h9, 11.1.10-h10, 11.1.10-h11, 11.1.13, 11.2.7-h1, 11.2.7-h2, 11.2.7-h3, 11.2.7-h4, 11.2.7-h5, 11.2.7-h6, 11.2.7-h7, 11.2.7-h8, 11.2.7-h9, 11.2.7-h10, 11.2.7-h11, 11.2.10-h1, 11.2.10-h2, 11.2.10-h3, 11.2.10-h4 Known affected versions were inferred from fixed-version data and were not explicitly confirmed by the vendor: 12.1.3

The earliest recollection of this bug is traced back to PAN-OS 11.1.10-h12 - September 09, 2026. This bug is fixed in PAN-OS versions 12.1.4, 11.2.11, 11.2.7-h12, 11.1.12, 11.1.13-h1, 11.1.6-h25, 11.2.10-h5, 11.1.10-h12. 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 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-h25-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-h5-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 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-h12-addressed-issues