Last Modified: Sep 22, 2025
Affected Product(s):
BIG-IP TMOS
Known Affected Versions:
17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2, 17.5.0, 17.5.1
Opened: Sep 17, 2025 Severity: 3-Major
BIG-IP does not follow the updated section (https://www.rfc-editor.org/rfc/rfc4724.html#section-4.2) when handling a new connection from a peer. Instead, section https://datatracker.ietf.org/doc/html/rfc4271#section-6.8 is followed. This leads to a new connection from a peer being dropped when Graceful Restart happens.
BIG-IP will drop a new connection request and try to open a new connection right away.
BGP is configured with graceful restart. Peer restarts.
None
None