BugZero | Cisco BugID CSCwf88320 - Unexpected reboot on IOS-XE CUBE device while proc...

Cisco - Defect ID: CSCwf88320

Unexpected reboot on IOS-XE CUBE device while processing encrypted rtp traffic

Cisco - Defect ID: CSCwf88320

Unexpected reboot on IOS-XE CUBE device while processing encrypted rtp traffic

Last updated on December 29th, 2025

BugZero Risk Score
6.1 Medium

Overall: 6.1

Severity: 6.4

Lifecycle: 9.1

Popularity: 5.1

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Bug Details

Views: 14

Description

Symptom

Device intermittently reboots while processing encrypted rtp (srtp udp data) packets during normal operation. The event generate a system report with a qfp-ucode core inside it.

Conditions

There are encrypted rtp configuration on the device such as: dial-peer voice 102 voip preference 1 destination-pattern [40]... session protocol sipv2 session target ipv4:X.X.X.X:xxxx session transport tcp tls voice-class codec 1 voice-class sip srtp negotiate cisco voice-class sip options-keepalive retry 3 dtmf-relay rtp-nte srtp fallback no vad

Workaround

Remove encryption configuration for rtp traffic. Do not use srtp udp data packets. Change the configuration to simple rtp data packets.

Further Problem Description

This issue is presented due to the improper handle of the crypto voice traffic at software level where two data plane threads are trying to delete the same packet during a race condition.This is a corner condition but it also required the presence of crypto voice traffic configuration. If suspecting this issue, consider to collect "show tech" from the affected device as well as the "system report" files inside the core/ folder on the bootflash/harddisk.

Change history

2025-12-29 Added: 17.12.5c, 17.12.5d, 17.12.6, 17.12.6a, 17.15.1z, 17.15.4, 17.15.4a, 17.15.4b, 17.15.4c, 17.15.4d, 17.15.4s1, 17.18.1, 17.18.1a, 17.18.1w, 17.18.2, 17.9.8

2025-12-22 Added: 17.12.5c, 17.12.5d, 17.12.6, 17.12.6a, 17.15.1z, 17.15.4, 17.15.4a, 17.15.4b, 17.15.4c, 17.15.4d, 17.15.4s1, 17.18.1, 17.18.1a, 17.18.1w, 17.9.8

2025-12-03 Added: 17.12.5c, 17.12.5d, 17.12.6, 17.12.6a, 17.15.1z, 17.15.4, 17.15.4a, 17.15.4b, 17.15.4c, 17.15.4s1, 17.18.1, 17.18.1a, 17.18.1w, 17.9.8

2025-11-10 Added: 17.12.5c, 17.12.5d, 17.12.6, 17.12.6a, 17.15.1z, 17.15.4, 17.15.4a, 17.15.4b, 17.15.4c, 17.15.4s1, 17.18.1, 17.18.1a, 17.9.8

2025-11-03 Added: 17.12.5c, 17.12.5d, 17.12.6, 17.12.6a, 17.15.1z, 17.15.4, 17.15.4a, 17.15.4b, 17.15.4c, 17.18.1, 17.18.1a, 17.9.8

2025-10-09 Added: 17.12.5c, 17.12.6, 17.12.6a, 17.15.1z, 17.15.4, 17.15.4a, 17.15.4b, 17.15.4c, 17.18.1, 17.18.1a, 17.9.8

2025-10-02 Added: 17.12.5c, 17.12.6, 17.12.6a, 17.15.1z, 17.15.4, 17.15.4a, 17.15.4b, 17.15.4c, 17.18.1, 17.18.1a

2025-09-22 Added: 17.12.5c, 17.12.6, 17.15.1z, 17.15.4, 17.15.4a, 17.15.4b, 17.18.1, 17.18.1a

2025-09-08 Added: 17.12.6, 17.15.4, 17.15.4a, 17.18.1, 17.18.1a

2025-08-25 Added: 17.15.4, 17.15.4a, 17.18.1, 17.18.1a

2025-08-18 Added: 17.15.4, 17.15.4a

2025-07-08 Added: 17.12.3, 17.12.3a, 17.12.4, 17.12.4a, 17.12.4b, 17.12.5, 17.12.5a, 17.12.5b, 17.13.1, 17.13.1a, 17.14.1, 17.14.1a, 17.15.1, 17.15.1a, 17.15.1b, 17.15.1w, 17.15.1x, 17.15.1y, 17.15.2, 17.15.2a, 17.15.2b, 17.15.2c, 17.15.3, 17.15.3a, 17.15.3b, 17.16.1, 17.16.1a, 17.17.1, 17.9.5, 17.9.5a, 17.9.5b, 17.9.5c, 17.9.5d, 17.9.5e, 17.9.5f, 17.9.6, 17.9.6a, 17.9.6b, 17.9.7, 17.9.7a, 17.9.7b, Cupertino-17.9.5

Relevant Products

Click on a version to see all relevant bugs

Affected versions:No known affected versions

Fixed versions: 17.12.3, 17.12.3a, 17.12.4, 17.12.4a, 17.12.4b, 17.12.5, 17.12.5a, 17.12.5b, 17.12.5c, 17.12.5d, 17.12.6, 17.12.6a, 17.13.1, 17.13.1a, 17.14.1, 17.14.1a, 17.15.1, 17.15.1a, 17.15.1b, 17.15.1w, 17.15.1x, 17.15.1y, 17.15.1z, 17.15.2, 17.15.2a, 17.15.2b, 17.15.2c, 17.15.3, 17.15.3a, 17.15.3b, 17.15.4, 17.15.4a, 17.15.4b, 17.15.4c, 17.15.4d, 17.15.4s1, 17.16.1, 17.16.1a, 17.17.1, 17.18.1, 17.18.1a, 17.18.1w, 17.18.2, 17.9.5, 17.9.5a, 17.9.5b, 17.9.5c, 17.9.5d, 17.9.5e, 17.9.5f, 17.9.6, 17.9.6a, 17.9.6b, 17.9.7, 17.9.7a, 17.9.7b, 17.9.8, Cupertino-17.9.5

Relevant Products

Click on a version to see all relevant bugs

Affected versions:No known affected versions

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Cisco - Defect ID: CSCwf88320

Unexpected reboot on IOS-XE CUBE device while processing encrypted rtp traffic

Cisco - Defect ID: CSCwf88320

Unexpected reboot on IOS-XE CUBE device while processing encrypted rtp traffic

Last updated on December 29th, 2025

BugZero Risk Score6.1 Medium

Bug Details

Symptom

Conditions

Workaround

Further Problem Description

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BugZero Risk Score
6.1 Medium