Last Modified: Jul 28, 2026
Affected Product(s):
BIG-IP TMOS
Known Affected Versions:
17.5.1.6, 17.5.1.8
Opened: May 04, 2026 Severity: 1-Blocking Related Article:
K000161170
The BIG-IP system is inaccessible via SSH or console. Running df shows that the /usr partition is 100% full.
Remote or console access to BIG-IP is not possible or upgrade failure.
One of the following: -- Upgrade an iSeries system to BIG-IP 17.5.1.6 -- Upgrade a VIPRION B4450N system to BIG-IP 17.5.1.6 -- Upgrade a vCMP guest, F5OS tenant, VIPRION, VE, or non-iSeries appliance to BIG-IP 17.5.1.6 Note that this issue only occurs on BIG-IP 17.5.1.6, due to incorrect volume sizing metadata applied when creating the /usr volume during installation of the BIG-IP 17.5.1.6 release image. This condition is specific to the BIG-IP 17.5.1.6 release only. This issue is addressed by Engineering Hotfixes which contain code to expand the size of the /usr volume during Engineering Hotfix installation, prior to installing the Engineering Hotfix. This solution was first implemented under ID2291757, then refined by the fix for ID2296269, then further refined by the fix for ID2298081. This incorrect volume sizing metadata issue is resolved under ID2301585 for BIG-IP 17.5.1.8 and later.
See KB article K000161170: https://my.f5.com/manage/s/article/K000161170 For iSeries appliances with an onboard FIPS HSM and VIPRION B4450N, follow option B. For all other systems, use an engineering hotfix with the fix for ID2296269 or ID2298081. The generally recommended solution is to upgrade to BIG-IP 17.5.1.8 or later.
None