Denial of service in Cisco Network Convergence System 4000 Series

Published: 2022-09-15
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-20845
Exploitation vector Local
Public exploit N/A
Vulnerable software
Cisco Network Convergence System 4000
Hardware solutions / Other hardware appliances

Cisco IOS XR
Operating systems & Components / Operating system

Vendor Cisco Systems, Inc

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Uncontrolled Memory Allocation

EUVDB-ID: #VU67388

Risk: Low


CVE-ID: CVE-2022-20845


Exploit availability:


The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to TL1 function does not free memory under some conditions. A local administrator can cause the TL1 process to consume large amounts of memory and perform a denial of service (DoS) attack.


Install updates from vendor's website.

Vulnerable software versions

Cisco Network Convergence System 4000: All versions

Cisco IOS XR: before 6.5.32

Fixed software versions

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?