A vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to exhaust process memory of an affected device. The vulnerability is due to insufficient queue management for Internet Group Management Protocol (IGMP) packets. An attacker could exploit this vulnerability by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to cause memory exhaustion, resulting in instability of other processes. These processes may include, but are not limited to, interior and exterior routing protocols. Cisco will release software updates that address this vulnerability.
Advisories

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Fixes

Solution

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Workaround

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History

Wed, 22 Oct 2025 09:15:00 +0900


Wed, 22 Oct 2025 05:30:00 +0900


Wed, 22 Oct 2025 04:30:00 +0900


Sat, 09 Nov 2024 01:15:00 +0900

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2021-11-03'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'active', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2025-10-21T23:35:37.484Z

Reserved: 2019-12-12T00:00:00.000Z

Link: CVE-2020-3566

cve-icon Vulnrichment

Updated: 2024-08-04T07:37:55.511Z

cve-icon NVD

Status : Analyzed

Published: 2020-08-29T16:15:09.797

Modified: 2025-10-28T13:53:58.107

Link: CVE-2020-3566

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses