{"id":"CVE-2025-30660","aliases":["EUVD-2025-10517","GHSA-332p-x9c3-3hm3"],"status":"published","title":"Junos OS: MX Series: Decapsulation of specific GRE packets leads to PFE reset","description":"An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).When processing a high rate of specific GRE traffic destined to the device, the respective PFE will hang causing traffic forwarding to stop. \n\n\n\nWhen this issue occurs the following logs can be observed:\n\n \u003cfpc #\u003e MQSS(0): LI-3: Received a parcel with more than 512B accompanying data \nCHASSISD_FPC_ASIC_ERROR: ASIC Error detected \u003c...\u003e\n\n\nThis issue affects Junos OS:\n\n  *  all versions before 21.2R3-S9,\n  *  21.4 versions before 21.4R3-S8,\n  *  22.2 versions before 22.2R3-S4,\n  *  22.4 versions before 22.4R3-S5,\n  *  23.2 versions before 23.2R2-S2,\n  *  23.4 versions before 23.4R2.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/RE:M","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00433,"percentile":0.37872,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-754"],"published":"2025-04-09T20:05:25Z","modified":"2026-06-17T09:09:07Z","products":[{"vendor":"juniper","product":"junos"},{"vendor":"juniper networks","product":"junos os"}],"references":[{"url":"https://supportportal.juniper.net/JSA96471","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-30660"},{"url":"https://github.com/advisories/GHSA-332p-x9c3-3hm3"}],"sources":{"cve":[{"id":"CVE-2025-30660","title":"Junos OS: MX Series: Decapsulation of specific GRE packets leads to PFE reset","description":"An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).When processing a high rate of specific GRE traffic destined to the device, the respective PFE will hang causing traffic forwarding to stop. \n\n\n\nWhen this issue occurs the following logs can be observed:\n\n \u003cfpc #\u003e MQSS(0): LI-3: Received a parcel with more than 512B accompanying data \nCHASSISD_FPC_ASIC_ERROR: ASIC Error detected \u003c...\u003e\n\n\nThis issue affects Junos OS:\n\n  *  all versions before 21.2R3-S9,\n  *  21.4 versions before 21.4R3-S8,\n  *  22.2 versions before 22.2R3-S4,\n  *  22.4 versions before 22.4R3-S5,\n  *  23.2 versions before 23.2R2-S2,\n  *  23.4 versions before 23.4R2.","status":"published","published":"2025-04-09T20:05:25.345Z","modified":"2025-04-09T20:29:59.919Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/RE:M","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-754"],"updated_at":"2026-11-02T14:32:35.742256Z"}],"euvd":[{"id":"EUVD-2025-10517","description":"An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).When processing a high rate of specific GRE traffic destined to the device, the respective PFE will hang causing traffic forwarding to stop. \n\n\n\nWhen this issue occurs the following logs can be observed:\n\n \u003cfpc #\u003e MQSS(0): LI-3: Received a parcel with more than 512B accompanying data \nCHASSISD_FPC_ASIC_ERROR: ASIC Error detected \u003c...\u003e\n\n\nThis issue affects Junos OS:\n\n  *  all versions before 21.2R3-S9,\n  *  21.4 versions before 21.4R3-S8,\n  *  22.2 versions before 22.2R3-S4,\n  *  22.4 versions before 22.4R3-S5,\n  *  23.2 versions before 23.2R2-S2,\n  *  23.4 versions before 23.4R2.","status":"published","published":"2025-04-09T20:05:25Z","modified":"2025-04-09T20:29:59Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/RE:M","level":"high"}],"updated_at":"2026-11-02T20:52:37.733624Z"}],"ghsa":[{"id":"GHSA-332p-x9c3-3hm3","title":"An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding...","description":"An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).When processing a high rate of specific GRE traffic destined to the device, the respective PFE will hang causing traffic forwarding to stop. \n\n\n\nWhen this issue occurs the following logs can be observed:\n\n \u003cfpc #\u003e MQSS(0): LI-3: Received a parcel with more than 512B accompanying data \nCHASSISD_FPC_ASIC_ERROR: ASIC Error detected \u003c...\u003e\n\n\nThis issue affects Junos OS:\n\n  *  all versions before 21.2R3-S9,\n  *  21.4 versions before 21.4R3-S8,\n  *  22.2 versions before 22.2R3-S4,\n  *  22.4 versions before 22.4R3-S5,\n  *  23.2 versions before 23.2R2-S2,\n  *  23.4 versions before 23.4R2.","status":"published","published":"2025-04-09T21:31:44Z","modified":"2025-04-09T21:31:52Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/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:X/V:X/RE:M/U:X","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-754"],"updated_at":"2026-11-02T15:01:03.275422Z"}],"nvd":[{"id":"CVE-2025-30660","description":"An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).When processing a high rate of specific GRE traffic destined to the device, the respective PFE will hang causing traffic forwarding to stop. \n\n\n\nWhen this issue occurs the following logs can be observed:\n\n \u003cfpc #\u003e MQSS(0): LI-3: Received a parcel with more than 512B accompanying data \nCHASSISD_FPC_ASIC_ERROR: ASIC Error detected \u003c...\u003e\n\n\nThis issue affects Junos OS:\n\n  *  all versions before 21.2R3-S9,\n  *  21.4 versions before 21.4R3-S8,\n  *  22.2 versions before 22.2R3-S4,\n  *  22.4 versions before 22.4R3-S5,\n  *  23.2 versions before 23.2R2-S2,\n  *  23.4 versions before 23.4R2.","status":"published","published":"2025-04-09T20:15:30.307Z","modified":"2026-06-17T09:09:07.97Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/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:X/V:X/RE:M/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-754"],"updated_at":"2026-11-02T14:11:00.087098Z"}]}}