Disclaimer

Hotfix versions were inferred because the vendor did not list them explicitly: 10.1.10 Known affected versions were inferred from fixed-version data and were not explicitly confirmed by the vendor: 9.1.16-h5, 10.2.4-h32, 11.0.1-h5

The earliest recollection of this bug is traced back to PAN-OS 10.1.10-h1 - July 22, 2025. This bug is fixed in PAN-OS versions 9.1.17, 11.0.2, 10.2.5, 10.1.10-h1. Fixed an issue caused by out of order TCP segments where the FIN flag and TCP data was truncated in a packet, which resulted in retransmission failure. Fixed an issue caused by out of order TCP segments where the TCP retransmission failed when the TCP segment had the FIN flag and the TCP data was truncated. For more information: https://docs.paloaltonetworks.com/pan-os/10-1/pan-os-release-notes/pan-os-10-1-10-known-and-addressed-issues/pan-os-10-1-10-h1-addressed-issues https://docs.paloaltonetworks.com/pan-os/10-2/pan-os-release-notes/pan-os-10-2-5-known-and-addressed-issues/pan-os-10-2-5-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-0/pan-os-release-notes/pan-os-11-0-2-known-and-addressed-issues/pan-os-11-0-2-addressed-issues https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-release-notes/pan-os-9-1-addressed-issues/pan-os-9-1-17-addressed-issues