Junos OS Evolved: PTX Series except PTX10003: An unauthenticated adjacent attacker sending specific valid traffic can cause a memory leak in cfmman leading to FPC crash and restart
Summary
| CVE | CVE-2025-52961 |
|---|---|
| State | PUBLISHED |
| Assigner | juniper |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-10-09 16:15:45 UTC |
| Updated | 2026-10-08 13:10:00 UTC |
| Description | An Uncontrolled Resource Consumption vulnerability in the Connectivity Fault Management (CFM) daemon and the Connectivity Fault Management Manager (cfmman) of Juniper Networks Junos OS Evolved on PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016 allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS). An attacker on an adjacent device sending specific valid traffic can cause cfmd to spike the CPU to 100% and cfmman's memory to leak, eventually to cause the FPC crash and restart. Continued receipt and processes of these specific valid packets will sustain the Denial of Service (DoS) condition. An indicator of compromise is to watch for an increase in cfmman memory rising over time by issuing the following command and evaluating the RSS number. If the RSS is growing into GBs then consider restarting the device to temporarily clear memory. user@device> show system processes node fpc<num> detail | match cfmman Example: show system processes node fpc0 detail | match cfmman F S UID PID PPID PGID SID C PRI NI ADDR SZ WCHAN RSS PSR STIME TTY TIME CMD 4 S root 15204 1 15204 15204 0 80 0 - 90802 - 113652 4 Sep25 ? 00:15:28 /usr/bin/cfmman -p /var/pfe -o -c /usr/conf/cfmman-cfg-active.xml This issue affects Junos OS Evolved on PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016: * from 23.2R1-EVO before 23.2R2-S4-EVO, * from 23.4 before 23.4R2-S4-EVO, * from 24.2 before 24.2R2-EVO, * from 24.4 before 24.4R1-S2-EVO, 24.4R2-EVO. This issue does not affect Junos OS Evolved on PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016 before 23.2R1-EVO. |
Risk And Classification
Primary CVSS: v4.0 7.1 HIGH from [email protected]
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:C/RE:M/U:Green
EPSS: 0.004830000 probability, percentile 0.396690000 (date 2026-10-08)
Problem Types: CWE-400 | CWE-400 CWE-400 Uncontrolled Resource Consumption
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 7.1 | HIGH | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/C... |
| 4.0 | CNA | CVSS | 7.1 | HIGH | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/... |
| 3.1 | [email protected] | Secondary | 6.5 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | CVSS | 6.5 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v4.0 Breakdown
Attack Vector
AdjacentAttack Complexity
LowAttack Requirements
NonePrivileges Required
NoneUser Interaction
NoneConfidentiality
NoneIntegrity
NoneAvailability
HighSub Conf.
NoneSub Integrity
NoneSub Availability
LowCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:C/RE:M/U:Green
CVSS v3.1 Breakdown
Attack Vector
AdjacentAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Juniper | Junos Os Evolved | 23.2 | r1 | All | All |
| Operating System | Juniper | Junos Os Evolved | 23.2 | r1-s1 | All | All |
| Operating System | Juniper | Junos Os Evolved | 23.2 | r1-s2 | All | All |
| Operating System | Juniper | Junos Os Evolved | 23.2 | r2 | All | All |
| Operating System | Juniper | Junos Os Evolved | 23.2 | r2-s1 | All | All |
| Operating System | Juniper | Junos Os Evolved | 23.2 | r2-s2 | All | All |
| Operating System | Juniper | Junos Os Evolved | 23.2 | r2-s3 | All | All |
| Operating System | Juniper | Junos Os Evolved | 23.4 | - | All | All |
| Operating System | Juniper | Junos Os Evolved | 23.4 | r1 | All | All |
| Operating System | Juniper | Junos Os Evolved | 23.4 | r1-s1 | All | All |
| Operating System | Juniper | Junos Os Evolved | 23.4 | r1-s2 | All | All |
| Operating System | Juniper | Junos Os Evolved | 23.4 | r2 | All | All |
| Operating System | Juniper | Junos Os Evolved | 23.4 | r2-s1 | All | All |
| Operating System | Juniper | Junos Os Evolved | 23.4 | r2-s2 | All | All |
| Operating System | Juniper | Junos Os Evolved | 23.4 | r2-s3 | All | All |
| Operating System | Juniper | Junos Os Evolved | 24.2 | - | All | All |
| Operating System | Juniper | Junos Os Evolved | 24.2 | r1 | All | All |
| Operating System | Juniper | Junos Os Evolved | 24.2 | r1-s2 | All | All |
| Operating System | Juniper | Junos Os Evolved | 24.4 | - | All | All |
| Operating System | Juniper | Junos Os Evolved | 24.4 | r1 | All | All |
| Operating System | Juniper | Junos Os Evolved | 24.4 | r2 | All | All |
| Hardware | Juniper | Ptx10001-36mr | - | All | All | All |
| Hardware | Juniper | Ptx10002-36qdd | - | All | All | All |
| Hardware | Juniper | Ptx10004 | - | All | All | All |
| Hardware | Juniper | Ptx10008 | - | All | All | All |
| Hardware | Juniper | Ptx10016 | - | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Juniper Networks | Junos OS Evolved | affected 23.2R1-EVO 23.2R2-S4-EVO semver | PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016 |
| CNA | Juniper Networks | Junos OS Evolved | affected 23.4-EVO 23.4R2-S4-EVO semver | PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016 |
| CNA | Juniper Networks | Junos OS Evolved | affected 24.2-EVO 24.2R2-EVO semver | PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016 |
| CNA | Juniper Networks | Junos OS Evolved | affected 24.4-EVO 24.4R1-S2-EVO, 24.4R2-EVO semver | PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016 |
| CNA | Juniper Networks | Junos OS Evolved | unaffected 23.2R1-EVO semver | PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016 |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| supportportal.juniper.net/JSA103144 | [email protected] | supportportal.juniper.net | Exploit, Vendor Advisory |
| www.juniper.net/documentation/us/en/software/junos/network-mgmt/topics/topic-... | [email protected] | www.juniper.net | Technical Description |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
Solutions
CNA: The following software releases have been updated to resolve this specific issue: Junos OS Evolved: 23.2R2-S4-EVO, 23.4R2-S4-EVO, 24.2R2-EVO, 24.4R1-S2-EVO, 24.4R2-EVO, 25.2R1-EVO, and all subsequent releases.
Workarounds
CNA: There are no known workarounds for this issue. To reduce the risk of exploitation, enable input and output access control lists (ACLs) and other filtering mechanisms to limit access to the device only from trusted users, hosts and networks.
Exploits
CNA: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
There are currently no legacy QID mappings associated with this CVE.