Junos OS (SRX firewalls)
CVE-2025-52964: Receipt of a specific BGP UPDATE causes an rpd crash on devices with BGP multipath configured
A Reachable Assertion 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).
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Junos OS 0 | 21.4R3-S7 or later |
| Junos OS 22.3 | 22.3R3-S3 or later |
| Junos OS 22.4 | 22.4R3-S5 or later |
| Junos OS 23.2 | 23.2R2 or later |
| Junos OS 23.4 | 23.4R2 or later |
| Junos OS 22.1 | 22.1* or later |
| Junos OS 22.2 | 22.2* or later |
| Junos OS Evolved 0 | 21.4R3-S7-EVO or later |
| Junos OS Evolved 22.3 | 22.3R3-S3-EVO or later |
| Junos OS Evolved 22.4 | 22.4R3-S5-EVO or later |
| Junos OS Evolved 23.2 | 23.2R2-EVO or later |
| Junos OS Evolved 23.4 | 23.4R2-EVO or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
A Reachable Assertion 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 the device receives a specific BGP UPDATE packet, the rpd crashes and restarts. Continuous receipt of this specific packet will cause a sustained DoS condition.
For the issue to occur, BGP multipath with "pause-computation-during-churn" must be configured on the device, and the attacker must send the paths via a BGP UPDATE from a established BGP peer.
This issue affects: Junos OS: * All versions before 21.4R3-S7, * from 22.3 before 22.3R3-S3, * from 22.4 before 22.4R3-S5, * from 23.2 before 23.2R2, * from 23.4 before 23.4R2.
Junos OS Evolved: * All versions before 21.4R3-S7-EVO, * from 22.3 before 22.3R3-S3-EVO, * from 22.4 before 22.4R3-S5-EVO, * from 23.2 before 23.2R2-EVO, * from 23.4 before 23.4R2-EVO.
Am I affected?
A sample BGP multipath configuration is shown below: [ protocols bgp group <name> multipath ]
Required config command: [ pause-computation-during-churn ]
Workarounds
This issue can be mitigated by disabling the multipath computation pause command "pause-computation-during-churn".
Exploitation
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.