Disclaimer

Hotfix versions were inferred because the vendor did not list them explicitly: 11.1.7-h1, 11.1.7-h2, 11.1.7-h3, 11.1.10-h1, 11.1.10-h2, 11.1.10-h3, 11.1.10-h4, 11.1.10-h6 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-h5 - August 14, 2026. This bug is fixed in PAN-OS versions 11.1.10-h7, 11.1.7-h4, 12.1.4, 11.1.12, 11.1.10-h5. ( PA-7500 firewalls only ) Fixed an issue where PA-7500 firewalls experienced silent traffic drops. During migration from PA-7050 to PA-7500 firewalls connected in series, intermittent connection losses occurred for some applications. Traffic leaving the PA-7050 was not received or processed by the PA-7500, even with direct connections and replaced cables/SFPs. Global counters did not indicate any drops on the PA-7500. 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-h5-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-h7-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-11-1-7-known-and-addressed-issues/pan-os-11-1-7-h4-addressed-issues