BugZero | Cisco BugID CSCvc38475 - Serdes not locking with ISSU and reload

Cisco - Defect ID: CSCvc38475

Serdes not locking with ISSU and reload

Cisco - Defect ID: CSCvc38475

Serdes not locking with ISSU and reload

Last updated on February 18th, 2026

BugZero Risk Score
7.8 High

Overall: 7.8

Severity: 8.2

Lifecycle: 9.1

Popularity: 4.6

What is the BugZero Risk Score?

Cisco Integration

Learn more about where this data comes from

Cisco Integration

Learn more

BugZero Plan

Streamline upgrades with automated vendor bug scrubs

BugZero Plan

Learn more

BugZero Prevent

Wish you caught this bug sooner? Get proactive today.

BugZero Prevent

Learn more

Bug Details

Description

Symptom

Ping failure and traffic loss

Conditions

Reload the box or perform ISSU

Workaround

None

Further Problem Description

None

Change history

2026-02-18 Removed: Fuji-16.7.1

2023-08-29 Added: 16.5.1, 16.6.1, Fuji-16.7.1

Top Cisco Defects

9.7Defect ID: CSCvz07394
2960X Stack may observe hang/freeze of member switches or complete stack.
9.7Defect ID: CSCvm90995
ASR1000-RP2: Rommon fails to boot Cisco IOS software of 1GB size
9.7Defect ID: CSCwc94466
Cisco ASA/FTD Firepower 2100 SSL/TLS Denial of Service Vulnerability
9.7Defect ID: CSCwj45822
Cisco ASA and FTD Software Remote Access VPN Brute Force Denial of Service Vulnerability
9.7Defect ID: CSCwc80831
High CPU seen across vEdge platform

Ready to prevent the next vendor outage?

Get a demo

Cisco - Defect ID: CSCvc38475

Serdes not locking with ISSU and reload

Cisco - Defect ID: CSCvc38475

Serdes not locking with ISSU and reload

Last updated on February 18th, 2026

BugZero Risk Score7.8 High

Bug Details

Symptom

Conditions

Workaround

Further Problem Description

Links

Top Cisco Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
7.8 High