{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-57029", "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "state": "PUBLISHED", "assignerShortName": "juniper", "dateReserved": "2026-06-23T16:27:00.249Z", "datePublished": "2026-07-09T21:12:36.288Z", "dateUpdated": "2026-07-09T21:12:36.288Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "platforms": ["QFX Series"], "product": "Junos OS Evolved", "vendor": "Juniper Networks", "versions": [{"lessThan": "23.4R2-S7-EVO", "status": "affected", "version": "0", "versionType": "custom"}, {"lessThan": "24.2R2-S5-EVO", "status": "affected", "version": "24.2", "versionType": "custom"}, {"lessThan": "24.4R2-S3-EVO", "status": "affected", "version": "24.4", "versionType": "custom"}, {"lessThan": "25.2R2-EVO", "status": "affected", "version": "25.2", "versionType": "custom"}]}], "configurations": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "To be exposed to this issue at least one sflow collector needs to be configured via:<br><br><tt>[ protocols&nbsp;sflow collector &lt;address&gt;&nbsp;<span style=\"background-color: rgb(255, 255, 255);\">]</span></tt>\n\n<br>"}], "value": "To be exposed to this issue at least one sflow collector needs to be configured via:\n\n[ protocols\u00a0sflow collector <address>\u00a0]"}], "datePublic": "2026-07-08T16:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "A&nbsp;Missing Synchronization vulnerability in the flow collector handler of Juniper Networks Junos OS Evolved on QFX Series allows an adjacent, unauthenticated attacker to cause a Denial-of-Service (DoS).<p><span style=\"background-color: rgb(255, 255, 255);\"><br></span></p><p><span style=\"background-color: rgb(255, 255, 255);\">When the reachability of an sFlow collector changes, the corresponding next-hop entry is updated.&nbsp;If this update occurs simultaneously with the sFlow thread accessing the next-hop data (which is outside the attackers control), it causes the evo-pfemand process to crash, impacting all traffic forwarding until the automatic process restart has completed.</span><br>\n\n<br><br>This issue affects Junos OS Evolved on QFX Series:<br></p><ul><li>all 23.2 versions,&nbsp;</li><li>23.4 versions before 23.4R2-S7-EVO,</li><li>24.2 versions before 24.2R2-S5-EVO,</li><li>24.4 versions before 24.4R2-S3-EVO,</li><li>25.2 versions before 25.2R2-EVO.</li></ul><br><p></p>"}], "value": "A\u00a0Missing Synchronization vulnerability in the flow collector handler of Juniper Networks Junos OS Evolved on QFX Series allows an adjacent, unauthenticated attacker to cause a Denial-of-Service (DoS).\n\n\nWhen the reachability of an sFlow collector changes, the corresponding next-hop entry is updated.\u00a0If this update occurs simultaneously with the sFlow thread accessing the next-hop data (which is outside the attackers control), it causes the evo-pfemand process to crash, impacting all traffic forwarding until the automatic process restart has completed.\n\n\n\n\nThis issue affects Junos OS Evolved on QFX Series:\n\n\n * all 23.2 versions,\u00a0\n * 23.4 versions before 23.4R2-S7-EVO,\n * 24.2 versions before 24.2R2-S5-EVO,\n * 24.4 versions before 24.4R2-S3-EVO,\n * 25.2 versions before 25.2R2-EVO."}], "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": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/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": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "ADJACENT", "baseScore": 6, "baseSeverity": "MEDIUM", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/RE:M", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "MODERATE"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-820", "description": "CWE-820 Missing Synchronization", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "shortName": "juniper", "dateUpdated": "2026-07-09T21:12:36.288Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://supportportal.juniper.net/JSA110089"}], "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 Evolved: 23.4R2-S7-EVO, 24.2R2-S5-EVO, 24.4R2-S3-EVO, 25.2R2-EVO, 25.4R1-EVO, and all subsequent releases."}], "value": "The following software releases have been updated to resolve this specific issue:\n\nJunos OS Evolved: 23.4R2-S7-EVO, 24.2R2-S5-EVO, 24.4R2-S3-EVO, 25.2R2-EVO, 25.4R1-EVO, and all subsequent releases."}], "source": {"advisory": "JSA110089", "defect": ["1909536"], "discovery": "USER"}, "title": "Junos OS Evolved: QFX Series: When sFlow collector reachability changes evo-pfemand process can crash", "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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