Bug ID 435055: ECDHE-ECDSA ciphers with hybrid certificate (RSA signed EC cert)

Last Modified: Aug 19, 2026

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

Known Affected Versions:
11.5.1, 11.5.1 hf1, 11.5.1 hf2, 11.5.1 hf3, 11.5.1 hf4, 11.5.1 hf5, 11.5.1 hf6, 11.5.1 hf7, 11.5.1 hf8, 11.5.1 hf9, 11.5.1 hf10, 11.5.1 hf11, 11.5.2, 11.5.2 hf1, 11.5.3, 11.5.3 hf1, 11.5.3 hf2, 11.5.4, 11.5.4 hf1, 11.5.4 hf2, 11.5.4 hf3, 11.5.4 hf4, 11.5.5, 11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 11.6.0 hf5, 11.6.0 hf6, 11.6.0 hf7, 11.6.0 hf8, 11.6.1, 11.6.1 hf1, 11.6.1 hf2, 11.6.2, 11.6.2 hf1

Fixed In:
12.0.0, 11.6.3, 11.5.6

Opened: Oct 23, 2013

Severity: 3-Major

Related Article: K17291

Symptoms

ECDHE-ECDSA cipher does not work with hybrid certificate (RSA signed EC cert). Log files may indicate SSL handshake error or a 'no shared ciphers' error.

Impact

ECDHE-ECDSA cipher does not work with hybrid certificate (RSA signed EC cert).

Conditions

Using a hybrid certificate (RSA signed EC cert).

Workaround

None.

Fix Information

The system now supports ECDHE-ECDSA ciphers with hybrid certificate (RSA signed EC cert).

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips