{"id":"CVE-2026-102078","aliases":["EUVD-2026-101466","GHSA-vwc2-r92q-mf9c"],"status":"published","title":"Junos OS: SRX Series: A high volume of DNS traffic over TCP can lead to a flowd crash","description":"A Use After Free vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).\n\n\n\nWhen web filtering for TCP traffic is configured, a high volume of DNS requests increases the likelihood of a flowd crash and restart, which leads to a complete service outage until the service has automatically recovered. This is a race condition outside the attacker's direct control.\n\nThis issue affects Junos OS on SRX Series:\n\n\n  *  All versions before 23.2R2-S5;\n  *  from 23.4 before 23.4R2-S6;\n  *  from 24.2 before 24.2R2-S3;\n  *  from 24.4 before 24.4R2-S1;\n  *  from 25.2 before 25.2R1-S1, 25.2R2.","severity":{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/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":"2026-11-12","score":0.00329,"percentile":0.26377,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2026-10-14T16:27:24Z","modified":"2026-10-15T16:24:19Z","products":[{"vendor":"juniper networks","product":"junos os"}],"references":[{"url":"https://supportportal.juniper.net/JSA112181","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102078"},{"url":"https://github.com/advisories/GHSA-vwc2-r92q-mf9c"}],"sources":{"cve":[{"id":"CVE-2026-102078","title":"Junos OS: SRX Series: A high volume of DNS traffic over TCP can lead to a flowd crash","description":"A Use After Free vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).\n\n\n\nWhen web filtering for TCP traffic is configured, a high volume of DNS requests increases the likelihood of a flowd crash and restart, which leads to a complete service outage until the service has automatically recovered. This is a race condition outside the attacker's direct control.\n\nThis issue affects Junos OS on SRX Series:\n\n\n  *  All versions before 23.2R2-S5;\n  *  from 23.4 before 23.4R2-S6;\n  *  from 24.2 before 24.2R2-S3;\n  *  from 24.4 before 24.4R2-S1;\n  *  from 25.2 before 25.2R1-S1, 25.2R2.","status":"published","published":"2026-10-14T16:27:24.894Z","modified":"2026-10-14T20:26:05.668Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/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":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T13:38:54.394896Z"}],"euvd":[{"id":"EUVD-2026-101466","description":"A Use After Free vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).\n\n\n\nWhen web filtering for TCP traffic is configured, a high volume of DNS requests increases the likelihood of a flowd crash and restart, which leads to a complete service outage until the service has automatically recovered. This is a race condition outside the attacker's direct control.\n\nThis issue affects Junos OS on SRX Series:\n\n\n  *  All versions before 23.2R2-S5;\n  *  from 23.4 before 23.4R2-S6;\n  *  from 24.2 before 24.2R2-S3;\n  *  from 24.4 before 24.4R2-S1;\n  *  from 25.2 before 25.2R1-S1, 25.2R2.","status":"published","published":"2026-10-14T16:27:24Z","modified":"2026-10-14T20:26:05Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/RE:M","level":"high"}],"updated_at":"2026-11-02T17:27:12.294621Z"}],"ghsa":[{"id":"GHSA-vwc2-r92q-mf9c","title":"A Use After Free vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS...","description":"A Use After Free vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).\n\n\n\nWhen web filtering for TCP traffic is configured, a high volume of DNS requests increases the likelihood of a flowd crash and restart, which leads to a complete service outage until the service has automatically recovered. This is a race condition outside the attacker's direct control.\n\nThis issue affects Junos OS on SRX Series:\n\n\n  *  All versions before 23.2R2-S5;\n  *  from 23.4 before 23.4R2-S6;\n  *  from 24.2 before 24.2R2-S3;\n  *  from 24.4 before 24.4R2-S1;\n  *  from 25.2 before 25.2R1-S1, 25.2R2.","status":"published","published":"2026-10-14T18:32:25Z","modified":"2026-10-14T18:32:34Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/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":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:13:28.02433Z"}],"nvd":[{"id":"CVE-2026-102078","description":"A Use After Free vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).\n\n\n\nWhen web filtering for TCP traffic is configured, a high volume of DNS requests increases the likelihood of a flowd crash and restart, which leads to a complete service outage until the service has automatically recovered. This is a race condition outside the attacker's direct control.\n\nThis issue affects Junos OS on SRX Series:\n\n\n  *  All versions before 23.2R2-S5;\n  *  from 23.4 before 23.4R2-S6;\n  *  from 24.2 before 24.2R2-S3;\n  *  from 24.4 before 24.4R2-S1;\n  *  from 25.2 before 25.2R1-S1, 25.2R2.","status":"published","published":"2026-10-14T17:18:03.4Z","modified":"2026-10-15T16:24:19.073Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/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":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:12:59.328869Z"}]}}