Bug ID 809729: When HTTP/2 stream is reset by a client, BIG-IP may not respond properly

Last Modified: Oct 16, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,, 15.0.0, 15.0.1

Fixed In:

Opened: Jul 26, 2019

Severity: 3-Major


When a client resets the HTTP/2 stream, the BIG-IP system may have several DATA frames ready to send. It drops these frames but does not account back those in a connection-send window. It can reduce this window to the value when no DATA frames are sent over this connection until the client updates the send window.


For any subsequent request after the send window loses enough size, DATA frames with payload are not sent to the client over the affected HTTP/2 connection.


-- BIG-IP system has a virtual server. -- HTTP/2 profile is assigned to it.



Fix Information

BIG-IP systems correctly handle dropping DATA frames accounting back their lengths in a connection-send window.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips