CVE-2025-20146
published 2025-03-12CVE-2025-20146: A vulnerability in the Layer 3 multicast feature of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers, ASR 9902 Compact…
PriorityP349high8.6CVSS 3.1
AVNACLPRNUINSCCNINAH
EPSS
0.50%
39.4th percentile
A vulnerability in the Layer 3 multicast feature of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers, ASR 9902 Compact High-Performance Routers, and ASR 9903 Compact High-Performance Routers could allow an unauthenticated, remote attacker to cause a line card to reset, resulting in a denial of service (DoS) condition.
This vulnerability is due to the incorrect handling of malformed IPv4 multicast packets that are received on line cards where the interface has either an IPv4 access control list (ACL) or a QoS policy applied. An attacker could exploit this vulnerability by sending crafted IPv4 multicast packets through an affected device. A successful exploit could allow the attacker to cause line card exceptions or a hard reset. Traffic over that line card would be lost while the line card reloads.
Affected
23 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_ios_xr_software | — | — |
| cisco | cisco_ios_xr_software | — | — |
| cisco | cisco_ios_xr_software | — | — |
| cisco | cisco_ios_xr_software | — | — |
| cisco | cisco_ios_xr_software | — | — |
| cisco | cisco_ios_xr_software | — | — |
| cisco | cisco_ios_xr_software | — | — |
| cisco | cisco_ios_xr_software | — | — |
| cisco | cisco_ios_xr_software | — | — |
| cisco | cisco_ios_xr_software | — | — |
| cisco | cisco_ios_xr_software | — | — |
| cisco | ios_xr | — | — |
| cisco | ios_xr | — | — |
| cisco | ios_xr | — | — |
| cisco | ios_xr | — | — |
| cisco | ios_xr | — | — |
| cisco | ios_xr | — | — |
| cisco | ios_xr | — | — |
| cisco | ios_xr | — | — |
| cisco | ios_xr | — | — |
| cisco | ios_xr | — | — |
| cisco | ios_xr | — | — |
| cisco | ios_xr | — | — |
CVSS provenance
nvdv3.18.6HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
vendor_cisco8.6HIGH
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Cisco
Cisco IOS XR Software for ASR 9000 Series Routers Layer 3 Multicast Denial of Service Vulnerability
vendor_cisco·2025-03-12·CVSS 8.6
CVE-2025-20146 [HIGH] CWE-20 Cisco IOS XR Software for ASR 9000 Series Routers Layer 3 Multicast Denial of Service Vulnerability
Cisco IOS XR Software for ASR 9000 Series Routers Layer 3 Multicast Denial of Service Vulnerability
A vulnerability in the Layer 3 multicast feature of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers, ASR 9902 Compact High-Performance Routers, and ASR 9903 Compact High-Performance Routers could allow an unauthenticated, remote attacker to cause a line card to reset, resulting in a denial of service (DoS) condition.
This vulnerability is due to the incorrect handling of malformed IPv4 multicast packets that are received on line cards where the interface has either an IPv4 access control list (ACL) or a QoS policy applied. An attacker could exploit this vulnerability by sending crafted IPv4 multicast packets through an affected device. A successful exploit coul
Cisco
Cisco IOS XR Software for ASR 9000 Series Routers Layer 3 Multicast Denial of Service Vulnerability
vendor_cisco·CVSS 3.1
CVE-2025-20146 Cisco IOS XR Software for ASR 9000 Series Routers Layer 3 Multicast Denial of Service Vulnerability
CVE-2025-20146: Cisco IOS XR Software for ASR 9000 Series Routers Layer 3 Multicast Denial of Service Vulnerability
A vulnerability in the Layer 3 multicast feature of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers, ASR 9902 Compact High-Performance Routers, and ASR 9903 Compact High-Performance Routers could allow an unauthenticated, remote attacker to cause a line card to reset, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of malformed IPv4 multicast packets that are received on line cards where the interface has either an IPv4 access control list (ACL) or a QoS policy applied. An attacker could exploit this vulnerability by sending crafted IPv4 multicast packets through an affected device. A successfu
GHSA
GHSA-f6jg-88p5-x574: A vulnerability in the Layer 3 multicast feature of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers, ASR 9902 Compact Hig
ghsa_unreviewed·2025-03-12
CVE-2025-20146 [HIGH] CWE-20 GHSA-f6jg-88p5-x574: A vulnerability in the Layer 3 multicast feature of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers, ASR 9902 Compact Hig
A vulnerability in the Layer 3 multicast feature of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers, ASR 9902 Compact High-Performance Routers, and ASR 9903 Compact High-Performance Routers could allow an unauthenticated, remote attacker to cause a line card to reset, resulting in a denial of service (DoS) condition.
This vulnerability is due to the incorrect handling of malformed IPv4 multicast packets that are received on line cards where the interface has either an IPv4 access control list (ACL) or a QoS policy applied. An attacker could exploit this vulnerability by sending crafted IPv4 multicast packets through an affected device. A successful exploit could allow the attacker to cause line card exceptions or a hard reset. Traffic over that line card would
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-03-12
Published