{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-57030", "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "state": "PUBLISHED", "assignerShortName": "juniper", "dateReserved": "2026-06-23T16:27:00.249Z", "datePublished": "2026-07-09T21:13:12.671Z", "dateUpdated": "2026-07-09T21:13:12.671Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "platforms": ["SRX Series"], "product": "Junos OS", "vendor": "Juniper Networks", "versions": [{"lessThan": "24.2R2-S3", "status": "affected", "version": "24.2", "versionType": "custom"}, {"lessThan": "24.4R2-S1", "status": "affected", "version": "24.4", "versionType": "custom"}, {"lessThan": "25.2R1-S2", "status": "affected", "version": "25.2", "versionType": "custom"}, {"lessThan": "24.2R1", "status": "unaffected", "version": "0", "versionType": "custom"}]}], "datePublic": "2026-07-08T16:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "A Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') 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).<br><br>As part of the stateful traffic processing on SRX Series devices flows are being established, and removed when not needed anymore. During the removal process the timeout of a flow should be set to 3 seconds and consequentially the flow should be removed shortly after. Due to a race condition occurring when setting the timeout there is a chance (the exact conditions are outside the attackers control) that the timeout is instead set to a very high value of larger than 10,000 seconds:<br><br>\n\n<tt>user@host&gt; show security flow session | match timeout<br>Session ID: 98784248524, Policy name: PROD-FLOW/4, HA State: Active, Timeout: 85250, Session State: Valid</tt><br><br>This will lead to an accumulation of flows which can be observed by an ever-increasing value of invalidated sessions in the output of 'show security flow session summary':<br><br><tt>user@host&gt; show security flow session summary | match invalid<br>Invalidated sessions: 216931</tt><p>These sessions can't be cleared manually with the 'clear security flow session' command, which will either lead to forwarding to stop (and the system needs to be manually recovered with a reboot) or to a flowd core and automatic reboot.</p><p><br>This issue affects Junos OS on SRX Series:<br></p><ul><li>24.2 versions before 24.2R2-S3,</li><li>24.4 versions before 24.4R2-S1, 24.4R2-S2,</li><li>25.2&nbsp;versions&nbsp;before 25.2R1-S2, 25.2R2.</li></ul><p></p><p>This issue does not affect releases earlier than 24.2R1;</p>"}], "value": "A Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') 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\nAs part of the stateful traffic processing on SRX Series devices flows are being established, and removed when not needed anymore. During the removal process the timeout of a flow should be set to 3 seconds and consequentially the flow should be removed shortly after. Due to a race condition occurring when setting the timeout there is a chance (the exact conditions are outside the attackers control) that the timeout is instead set to a very high value of larger than 10,000 seconds:\n\n\n\nuser@host> show security flow session | match timeout\nSession ID: 98784248524, Policy name: PROD-FLOW/4, HA State: Active, Timeout: 85250, Session State: Valid\n\nThis will lead to an accumulation of flows which can be observed by an ever-increasing value of invalidated sessions in the output of 'show security flow session summary':\n\nuser@host> show security flow session summary | match invalid\nInvalidated sessions: 216931These sessions can't be cleared manually with the 'clear security flow session' command, which will either lead to forwarding to stop (and the system needs to be manually recovered with a reboot) or to a flowd core and automatic reboot.\n\n\nThis issue affects Junos OS on SRX Series:\n\n\n * 24.2 versions before 24.2R2-S3,\n * 24.4 versions before 24.4R2-S1, 24.4R2-S2,\n * 25.2\u00a0versions\u00a0before 25.2R1-S2, 25.2R2.\n\n\n\n\nThis issue does not affect releases earlier than 24.2R1;"}], "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."}], "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": "USER", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "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:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:U/RE:M", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "MODERATE"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-362", "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "shortName": "juniper", "dateUpdated": "2026-07-09T21:13:12.671Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://supportportal.juniper.net/JSA110090"}], "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: 24.2R2-S3, 24.4R2-S1, 25.2R1-S2, 25.2R2, 25.4R1, and all subsequent releases."}], "value": "The following software releases have been updated to resolve this specific issue:\n\nJunos OS: 24.2R2-S3, 24.4R2-S1, 25.2R1-S2, 25.2R2, 25.4R1, and all subsequent releases."}], "source": {"advisory": "JSA110090", "defect": ["1876709"], "discovery": "USER"}, "title": "Junos OS: SRX Series: Flow sessions are not getting cleared leading to a DoS", "workarounds": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "There are no known workarounds for this issue."}], "value": "There are no known workarounds for this issue."}], "x_generator": {"engine": "Vulnogram 0.1.0-dev"}}}}

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{"affected": [{"configurations": [{"platform": ["srx_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[24.2,24.2R2-S3)"}}, {"platform": ["srx_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[24.4,24.4R2-S1)"}}, {"platform": ["srx_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[25.2,25.2R1-S2)"}}, {"platform": ["srx_series"], "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,24.2R1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Junos OS", "source": "cna", "vendor": "Juniper Networks"}, "product": "junos_os", "vendor": "juniper_networks"}], "created": "2026-07-09T23:15:06.853480+00:00", "updated": "2026-07-09T23:15:06.853526+00:00", "vendors": ["juniper_networks", "juniper_networks$PRODUCT$junos_os"]}