Last Modified: Jul 30, 2026
Affected Product(s):
F5OS F5OS-A
Known Affected Versions:
F5OS-A 1.8.3, F5OS-A 1.8.4, F5OS-A 1.8.4-HR1
Fixed In:
F5OS v2.0.0
Opened: Jan 23, 2026 Severity: 2-Critical
A small number of r5000/r10000 appliances have been found with a hardware defect on the internal PCIe links. This defect can result in erroneous internal register reads, causing the system to falsely detect conditions such as link down or optic unplugged. Other alarms or indications of system instability are possible.
The system is unstable and unusable.
There are no special conditions. This issue occurs frequently on affected systems.
There is no specific log entry to detect the issue. Provide a QKVIEW for assessment by F5. If the issue is found in the QKVIEW, the unit must be returned and replaced.
The manufacturing test has been updated to screen these defects in production. Existing units confirmed to have the issue must be returned and replaced.