The earliest recollection of this bug is traced back to PAN-OS 11.1.10-h21 - May 13, 2026. This bug is fixed in PAN-OS versions 11.1.13-h3, 11.2.11, 11.2.7-h12, 11.2.10-h5, 11.1.10-h21, 11.1.6-h29, 11.1.14. On firewalls with TPM (Trusted Platform Module) support, device certificate renewals may fail due to a disk partition being full. This latter occurs because temporary files aren't being deleted during device certificate status checks. Fixed an issue where the /opt/pancfg/mgmt/ssl/private/ directory on Palo Alto Networks devices with TPM support became 100% utilized due to an accumulation of undeleted .pub_pem files. This occurred because executing the show device-certificate status CLI command initiated a process that generated these files but failed to remove them, which prevented the fetching of new device certificates. For more information: https://docs.paloaltonetworks.com/ngfw/release-notes/12-1/pan-os-12-1-3-known-and-addressed-issues/pan-os-12-1-3-known-issues https://docs.paloaltonetworks.com/ngfw/release-notes/12-1/pan-os-12-1-5-known-and-addressed-issues/pan-os-12-1-5-known-issues https://docs.paloaltonetworks.com/ngfw/release-notes/12-1/pan-os-12-1-6-known-and-addressed-issues/pan-os-12-1-6-known-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-h21-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-h3-addressed-issues https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-release-notes/pan-os-11-1-14-known-and-addressed-issues/pan-os-11-1-14-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-h29-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