{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-57027", "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "state": "PUBLISHED", "assignerShortName": "juniper", "dateReserved": "2026-06-23T16:27:00.248Z", "datePublished": "2026-07-09T21:08:07.684Z", "dateUpdated": "2026-07-10T14:33:33.977Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "platforms": ["EX4100 Series", "EX4400 Series"], "product": "Junos OS", "vendor": "Juniper Networks", "versions": [{"lessThan": "23.2R2-S7", "status": "affected", "version": "0", "versionType": "custom"}, {"lessThan": "23.4R2-S7", "status": "affected", "version": "23.4", "versionType": "custom"}, {"lessThan": "24.2R2-S4", "status": "affected", "version": "24.2", "versionType": "custom"}, {"lessThan": "24.4R2", "status": "affected", "version": "24.4", "versionType": "custom"}]}], "configurations": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "A system is only affected if sFlow for multicast is explicitly enabled with:<br><br><tt>[ forwarding-options sflow egress-multicast enable ]</tt>"}], "value": "A system is only affected if sFlow for multicast is explicitly enabled with:\n\n[ forwarding-options sflow egress-multicast enable ]"}], "datePublic": "2026-07-08T16:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "A Missing Release of Memory after Effective Lifetime vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on specific EX Series devices allows an unauthenticated adjacent attacker to cause a Denial-of-Service (DoS).<p>When sFlow is configured in a Virtual Chassis (VC) scenario with EX4100 Series or EX4400 Series devices, multicast traffic which is received on one VC member and sent out on another member leads to a memory leak and ultimately an FPC crash and restart.</p>The leak can be monitored by watching the continuous increase of the buffer values in the output of:<br><br><tt>user@host&gt; 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