CVE-2025-30651: Junos OS and Junos OS Evolved: Receipt of a specific ICMPv6 packet causes a memory overrun leading to an rpd crash
A Buffer Access with Incorrect Length Value vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). When an attacker sends a specific ICMPv6 packet to an interface with "protocols router-advertisement" configured, rpd crashes and restarts. Continued receipt of this packet will cause a sustained DoS condition.
This issue only affects systems configured with IPv6.
This issue affects Junos OS:
All versions before 21.2R3-S9, from 21.4 before 21.4R3-S10, from 22.2 before 22.2R3-S6, from 22.4 before 22.4R3-S4, from 23.2 before 23.2R2-S2, from 23.4 before 23.4R2;
and Junos OS Evolved: All versions before 21.2R3-S9-EVO, from 21.4-EVO before 21.4R3-S10-EVO, from 22.2-EVO before 22.2R3-S6-EVO, from 22.4-EVO before 22.4R3-S4-EVO, from 23.2-EVO before 23.2R2-S2-EVO, from 23.4-EVO before 23.4R2-EVO.
Affected Software
Remediation
Information
Event History
Frequently Asked Questions
What is the severity of CVE-2025-30651?
CVE-2025-30651 has a severity rating that allows an unauthenticated, network-based attacker to cause a Denial of Service.
How do I fix CVE-2025-30651?
To fix CVE-2025-30651, upgrade to the latest versions of Junos OS or Junos OS Evolved as recommended by Juniper Networks for your specific platform.
Which versions are affected by CVE-2025-30651?
CVE-2025-30651 affects Junos OS versions prior to 21.2R3-S9, 21.4R3-S10; and Junos OS Evolved versions prior to 21.2R3-S9-EVO, 21.4R3-S10-EVO.
Can CVE-2025-30651 be exploited remotely?
Yes, CVE-2025-30651 can be exploited by an unauthenticated network-based attacker through specific ICMPv6 packets.
What are the potential impacts of CVE-2025-30651?
The potential impact of CVE-2025-30651 is a Denial of Service (DoS) condition on affected devices.