BugZero | Cisco BugID CSCwa88776 - RIB Crash While Re-evaluating Quarantined Paths

Cisco - Defect ID: CSCwa88776

RIB Crash While Re-evaluating Quarantined Paths

Cisco - Defect ID: CSCwa88776

RIB Crash While Re-evaluating Quarantined Paths

Last updated on January 26th, 2025

BugZero Risk Score
7.7 High

Overall: 7.7

Severity: 8.2

Lifecycle: 9.1

Popularity: 3.7

What is the BugZero Risk Score?

Cisco Integration

Learn more about where this data comes from

Cisco Integration

Learn more

Bug Scrub Advisor

Streamline upgrades with automated vendor bug scrubs

Bug Scrub Advisor

Learn more

BugZero Enterprise

Wish you caught this bug sooner? Get proactive today.

BugZero Enterprise

Learn more

Bug Details

Description

General

Release-note

Symptom

ipv4_rib or ipv6_rib crashes while re-evaluating quarantined paths Prior to the crash a log like the following may exist in show logging: ipv4_rib[1262]: %ROUTING-RIB-7-SERVER_ROUTING_DEPTH : Recursion loop looking up prefix

Conditions

Route with multiple paths with some paths quarantined and some paths not On re-evaluation of quarantined paths a new path that should be quarantined is found This can occur with routes that cover their Nexhops (example 192.168.1.0/24 with nexthop 192.168.1.1/32) or with deeply recursive routes where RIB is unable to resolve the nexthop due to the depth of recursion

Workaround

None, however after the crash is seen all paths will be properly quarantined, so further crashes without topology changes will not be seen

Further Problem Description

Platform independent issue, only affects release 7.3.3 Should not be traffic impacting

Change history

2025-01-26 Added: 24.1.1, 24.1.2, 24.2.1, 24.2.11, 24.2.2, 24.2.20, 24.3.1, 24.3.2, 24.4.1, 24.4.10, 7.10.1, 7.10.2, 7.11.1, 7.11.2, 7.11.21, 7.3.4, 7.3.5, 7.3.6, 7.5.2, 7.5.3, 7.5.4, 7.5.5, 7.6.1, 7.6.15, 7.6.2, 7.6.3, 7.7.1, 7.7.2, 7.7.21, 7.8.1, 7.8.2, 7.8.22, 7.8.23, 7.9.1, 7.9.2, 7.9.21

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions:No known affected versions

Fixed versions: 24.1.1, 24.1.2, 24.2.1, 24.2.11, 24.2.2, 24.2.20, 24.3.1, 24.3.2, 24.4.1, 24.4.10, 7.10.1, 7.10.2, 7.11.1, 7.11.2, 7.11.21, 7.3.4, 7.3.5, 7.3.6, 7.5.2, 7.5.3, 7.5.4, 7.5.5, 7.6.1, 7.6.15, 7.6.2, 7.6.3, 7.7.1, 7.7.2, 7.7.21, 7.8.1, 7.8.2, 7.8.22, 7.8.23, 7.9.1, 7.9.2, 7.9.21

Relevant Products

Click on a version to see all relevant bugs

Affected versions:No known affected versions

Top Cisco Defects

9.7Defect ID: CSCws52722
Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability
9.7Defect ID: CSCwt50498
Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability
9.7Defect ID: CSCvn12442
Under heavy load, ISE live logs stop working on ISE 2.3
9.7Defect ID: CSCws61409
Live Logs Not Displaying on GUI Due to Fast Expansion of MNT Database
9.7Defect ID: CSCvz07394
2960X Stack may observe hang/freeze of member switches or complete stack.

Ready to prevent the next vendor outage?

Get a demo

Cisco - Defect ID: CSCwa88776

RIB Crash While Re-evaluating Quarantined Paths

Cisco - Defect ID: CSCwa88776

RIB Crash While Re-evaluating Quarantined Paths

Last updated on January 26th, 2025

BugZero Risk Score7.7 High

Bug Details

General

Symptom

Conditions

Workaround

Further Problem Description

Links

Top Cisco Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
7.7 High