BugZero | F5 BugID 477888 - ESP ICSA support is non-functional on versions 11....

F5 - Defect ID: 477888

ESP ICSA support is non-functional on versions 11.4.0 and up

F5 - Defect ID: 477888

ESP ICSA support is non-functional on versions 11.4.0 and up

Last updated on July 18th, 2026

BugZero Risk Score
6.9 Medium

Overall: 6.9

Severity: 7.3

Community: 4.2

Lifecycle: 8.3

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Bug Details

Priority: 3-Major
Status: Verified
Impact Category: TMOS

Description

Symptoms

Attempting to turn on ICSA logging for ESP packets will lead to the following logs. Aug 21 10:47:17 2000a info tmm1[10347]: 01070417:6: ICSA: source: %A, destination: %A, spi: 0x%x, seqno: 0x%x ESP packet discarded: "inbound"

Impact

ICSA logging misses information that is required for certification.

Conditions

ICSA logging for ESP packets is enabled. ESP connections are sent through the BIG-IP. Logs similar to the following are found in /var/log/ICSA Aug 21 10:47:17 2000a info tmm1[10347]: 01070417:6: ICSA: source: %A, destination: %A, spi: 0x%x, seqno: 0x%x ESP packet discarded: "inbound"

Workaround

None

Fix Information

ICSA logging no longer misses information that is required for certification.

Change history

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

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, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 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, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3

Fixed versions: 12.0.0

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 12.0.0

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F5 - Defect ID: 477888

ESP ICSA support is non-functional on versions 11.4.0 and up

F5 - Defect ID: 477888

ESP ICSA support is non-functional on versions 11.4.0 and up

Last updated on July 18th, 2026

BugZero Risk Score6.9 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 477888

ESP ICSA support is non-functional on versions 11.4.0 and up

F5 - Defect ID: 477888

ESP ICSA support is non-functional on versions 11.4.0 and up

Last updated on July 18th, 2026

BugZero Risk Score6.9 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
6.9 Medium

BugZero Risk Score
6.9 Medium