An Out-of-bounds Write vulnerability in the connectivity fault management (CFM) daemon of Juniper Networks Junos OS on MX Series with MPC-BUILTIN, MPC1 through MPC9 line cards allows an unauthenticated adjacent attacker to send a malformed packet to the device, leading to an FPC crash and restart, resulting in a Denial of Service (DoS).
Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.
This issue affects Juniper Networks:
Junos OS:
  *  All versions before 22.2R3-S1,
  *  from 22.4 before 22.4R2.
This feature is not enabled by default.
                
            Metrics
Affected Vendors & Products
References
        History
                    Sat, 12 Jul 2025 13:45:00 +0000
| Type | Values Removed | Values Added | 
|---|---|---|
| Metrics | epss 
 | 
Fri, 11 Jul 2025 20:15:00 +0000
| Type | Values Removed | Values Added | 
|---|---|---|
| Metrics | ssvc 
 | 
Fri, 11 Jul 2025 15:15:00 +0000
| Type | Values Removed | Values Added | 
|---|---|---|
| Description | An Out-of-bounds Write vulnerability in the connectivity fault management (CFM) daemon of Juniper Networks Junos OS on MX Series with MPC-BUILTIN, MPC1 through MPC9 line cards allows an unauthenticated adjacent attacker to send a malformed packet to the device, leading to an FPC crash and restart, resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks: Junos OS: * All versions before 22.2R3-S1, * from 22.4 before 22.4R2. This feature is not enabled by default. | |
| Title | Junos OS: MX Series with MPC-BUILTIN, MPC 1 through MPC 9: Receipt and processing of a malformed packet causes one or more FPCs to crash | |
| Weaknesses | CWE-787 | |
| References |  | |
| Metrics | cvssV3_1 
 
 | 
 MITRE
                        MITRE
                    Status: PUBLISHED
Assigner: juniper
Published: 2025-07-11T15:04:35.691Z
Updated: 2025-07-11T20:10:52.673Z
Reserved: 2025-06-23T13:16:01.409Z
Link: CVE-2025-52952
 Vulnrichment
                        Vulnrichment
                    Updated: 2025-07-11T20:10:48.637Z
 NVD
                        NVD
                    Status : Awaiting Analysis
Published: 2025-07-11T15:15:25.930
Modified: 2025-07-15T13:14:49.980
Link: CVE-2025-52952
 Redhat
                        Redhat
                    No data.