{"id":"CVE-2026-102086","state":"PUBLISHED","title":"Junos OS: SRX Series: Multiple DNS queries processed by SecIntel and DGA in the same session cause a flowd crash","description":"A NULL Pointer Dereference vulnerability in the DNS plugin of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a complete Denial-of-Service (DoS).\n\n\n\nWhen multiple DNS queries are received in a single flow session, where one query matches a Security Intelligence (SecIntel) feed and another query is sent for DNS Domain Generation Algorithm (DGA) analysis, an error in processing logging of these asynchronous tasks can lead to an FPC crash. The exact timing conditions are outside an attacker's direct control.\n\nThis issue affects Junos OS on SRX Series:\n\n\n  *  All versions before 23.2R2-S7.7;\n  *  from 23.4 before 23.4R2-S8.13;\n  *  from 24.2 before 24.2R2-S5.5;\n  *  from 24.4 before 24.4R2-S4;\n  *  from 25.2 before 25.2R2-S1;\n  *  from 25.4 before 25.4R1-S2.","publishedAt":"2026-10-14T16:24:12.356Z","updatedAt":"2026-10-14T20:26:06.177Z","severity":{"score":8.2,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M","source":"juniper"},"assigner":"juniper","products":["Juniper Networks Junos OS"],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"23.2R2-S7.7","versionType":"custom"},{"version":"23.4","status":"affected","lessThan":"23.4R2-S8.13","versionType":"custom"},{"version":"24.2","status":"affected","lessThan":"24.2R2-S5.5","versionType":"custom"},{"version":"24.4","status":"affected","lessThan":"24.4R2-S4","versionType":"custom"},{"version":"25.2","status":"affected","lessThan":"25.2R2-S1","versionType":"custom"},{"version":"25.4","status":"affected","lessThan":"25.4R1-S2","versionType":"custom"}],"platforms":["SRX Series"]}],"references":["https://supportportal.juniper.net/JSA112170"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/102xxx/CVE-2026-102086.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-102086","state":"PUBLISHED","datePublished":"2026-10-14T16:24:12.356Z","dateUpdated":"2026-10-14T20:26:06.177Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2026-09-28T17:37:38.548Z"},"containers":{"cna":{"title":"Junos OS: SRX Series: Multiple DNS queries processed by SecIntel and DGA in the same session cause a flowd crash","descriptions":[{"lang":"en","value":"A NULL Pointer Dereference vulnerability in the DNS plugin of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a complete Denial-of-Service (DoS).\n\n\n\nWhen multiple DNS queries are received in a single flow session, where one query matches a Security Intelligence (SecIntel) feed and another query is sent for DNS Domain Generation Algorithm (DGA) analysis, an error in processing logging of these asynchronous tasks can lead to an FPC crash. The exact timing conditions are outside an attacker's direct control.\n\nThis issue affects Junos OS on SRX Series:\n\n\n  *  All versions before 23.2R2-S7.7;\n  *  from 23.4 before 23.4R2-S8.13;\n  *  from 24.2 before 24.2R2-S5.5;\n  *  from 24.4 before 24.4R2-S4;\n  *  from 25.2 before 25.2R2-S1;\n  *  from 25.4 before 25.4R1-S2."}],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"23.2R2-S7.7","versionType":"custom"},{"version":"23.4","status":"affected","lessThan":"23.4R2-S8.13","versionType":"custom"},{"version":"24.2","status":"affected","lessThan":"24.2R2-S5.5","versionType":"custom"},{"version":"24.4","status":"affected","lessThan":"24.4R2-S4","versionType":"custom"},{"version":"25.2","status":"affected","lessThan":"25.2R2-S1","versionType":"custom"},{"version":"25.4","status":"affected","lessThan":"25.4R1-S2","versionType":"custom"}],"platforms":["SRX Series"]}],"references":[{"url":"https://supportportal.juniper.net/JSA112170","tags":["vendor-advisory"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]},{"cvssV4_0":{"Automatable":"YES","Recovery":"AUTOMATIC","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"MODERATE"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-476","description":"CWE-476 NULL Pointer Dereference","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"juniper","orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateUpdated":"2026-10-14T16:24:12.356Z"},"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<tt><span style=\"background-color: rgb(255, 255, 255);\">[ services security-metadata-streaming policy &lt;name&gt; dns detections &lt;type&gt; (fallback-options) notification log ]</span><br>\n\n[ services security-intelligence profile &lt;name&gt; rule &lt;name&gt; then log ]</tt>"}],"value":"[ services security-metadata-streaming policy <name> dns detections <type> (fallback-options) notification log ]\n\n\n[ services security-intelligence profile <name> rule <name> then log ]"}],"datePublic":"2026-10-14T16:00:00.000Z","exploits":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"The following software releases have been updated to resolve this specific issue:\n\nJunos OS: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S4, 25.2R2-S1, 25.4R1-S2, 26.2R1, and all subsequent releases.<br>\n\n<b>Note:</b><span style=\"background-color: rgb(255, 255, 255);\"> For Junos OS releases 23.2, 23.4, and 24.2, specific respins have been referenced. Previously published versions of these releases have been rebuilt to resolve the security vulnerabilities identified in this advisory.</span>\n\n<br>"}],"value":"The following software releases have been updated to resolve this specific issue:\n\nJunos OS: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S4, 25.2R2-S1, 25.4R1-S2, 26.2R1, and all subsequent releases.\n\n\nNote: For Junos OS releases 23.2, 23.4, and 24.2, specific respins have been referenced. Previously published versions of these releases have been rebuilt to resolve the security vulnerabilities identified in this advisory."}],"source":{"advisory":"JSA112170","defect":["1924805"],"discovery":"USER"},"workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"There are no known workarounds for this issue, but if not strictly required the logging should be turned off."}],"value":"There are no known workarounds for this issue, but if not strictly required the logging should be turned off."}],"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-102086","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-14T20:16:16.422988Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-14T20:26:06.177Z"}}]}}}