BugZero | F5 BugID 2197321 - BIG-IP does not select FFDHE key share provided by...

F5 - Defect ID: 2197321

BIG-IP does not select FFDHE key share provided by the client on session resumption.

F5 - Defect ID: 2197321

BIG-IP does not select FFDHE key share provided by the client on session resumption.

Last updated on July 28th, 2026

BugZero Risk Score
6.8 Medium

Overall: 6.8

Severity: 7.3

Community: 4.2

Lifecycle: 7.8

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Bug Details

Priority: 3-Major
Status: Not Verified
Impact Category: Local Traffic Manager

Description

Symptoms

Connection terminates if the client does not allow secure renegotiation, otherwise renegotiation occurs.

Impact

Connection terminates if the client does not allow secure renegotiation, otherwise renegotiation occurs.

Conditions

ClientSSL that uses FFDHEgroups and has session tickets enabled. The client tries to resume an SSL session with an FFDHE key share that used FFDHE previously.

Workaround

None

Fix Information

None

Change history

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F5 - Defect ID: 2197321

BIG-IP does not select FFDHE key share provided by the client on session resumption.

F5 - Defect ID: 2197321

BIG-IP does not select FFDHE key share provided by the client on session resumption.

Last updated on July 28th, 2026

BugZero Risk Score
6.8 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 2197321

BIG-IP does not select FFDHE key share provided by the client on session resumption.

F5 - Defect ID: 2197321

BIG-IP does not select FFDHE key share provided by the client on session resumption.

Last updated on July 28th, 2026

BugZero Risk Score
6.8 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 2197321

BIG-IP does not select FFDHE key share provided by the client on session resumption.

F5 - Defect ID: 2197321

BIG-IP does not select FFDHE key share provided by the client on session resumption.

Last updated on July 28th, 2026

BugZero Risk Score6.8 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 2197321

BIG-IP does not select FFDHE key share provided by the client on session resumption.

F5 - Defect ID: 2197321

BIG-IP does not select FFDHE key share provided by the client on session resumption.

Last updated on July 28th, 2026

BugZero Risk Score6.8 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
6.8 Medium

BugZero Risk Score
6.8 Medium