{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-36499", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-06-06T19:34:00.960Z", "dateReserved": "2026-04-06T00:00:00.000Z", "datePublished": "2026-06-04T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-06-06T19:34:00.960Z"}, "descriptions": [{"lang": "en", "value": "A missing upper-bound check in the udpif_set_threads() function of Open vSwitch v3.6.90 allows an attacker with OVSDB write access to request an excessive number of handler or revalidation threads. This can cause a denial of service (DoS) via resource exhaustion."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://github.com/majdlatah/OVS-Other-Config-Bug"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-770", "lang": "en", "description": "CWE-770 Allocation of Resources Without Limits or Throttling"}]}], "references": [{"url": "https://github.com/majdlatah/OVS-Other-Config-Bug", "tags": ["exploit"]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-06-04T18:42:14.770294Z", "id": "CVE-2026-36499", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-04T18:43:31.463Z"}}]}, "dataVersion": "5.2"}

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{"bugzilla": {"description": "openvswitch: Open vSwitch: Denial of service via resource exhaustion due to missing upper-bound check", "id": "2484881", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2484881"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-770", "details": ["A flaw was found in Open vSwitch. A missing upper-bound check in udpif_set_threads() allows an attacker with OVSDB write access to request an excessive number of handler or revalidation threads, causing resource exhaustion and denial of service. Reported against Open vSwitch v3.6.90; affects deployments where OVSDB is writable by untrusted parties."], "mitigation": {"lang": "en:us", "value": "Restrict OVSDB write access to trusted administrators only. Do not expose OVSDB management interfaces to untrusted networks."}, "name": "CVE-2026-36499", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch3.5", "product_name": "Fast Datapath for RHEL 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch3.6", "product_name": "Fast Datapath for RHEL 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch", "product_name": "Fast Datapath for RHEL 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch2.10", "product_name": "Fast Datapath for RHEL 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch2.11", "product_name": "Fast Datapath for RHEL 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch2.12", "product_name": "Fast Datapath for RHEL 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch2.13", "product_name": "Fast Datapath for RHEL 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch2.11", "product_name": "Fast Datapath for RHEL 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch2.12", "product_name": "Fast Datapath for RHEL 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch2.13", "product_name": "Fast Datapath for RHEL 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch2.15", "product_name": "Fast Datapath for RHEL 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch2.16", "product_name": "Fast Datapath for RHEL 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch2.17", "product_name": "Fast Datapath for RHEL 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch3.1", "product_name": "Fast Datapath for RHEL 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch2.17", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch3.0", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch3.1", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch3.2", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch3.3", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch3.4", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch3.5", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Under investigation", "package_name": "openvswitch3.6", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Under investigation", "package_name": "openvswitch", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Under investigation", "package_name": "openvswitch2.17", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Under investigation", "package_name": "openvswitch3.0", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Under investigation", "package_name": "openvswitch3.1", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-06-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-36499\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-36499\nhttp://open.com\nhttps://github.com/majdlatah/OVS-Other-Config-Bug"], "statement": "Open vSwitch is vulnerable to denial of service via resource exhaustion in udpif_set_threads() due to a missing upper-bound check on thread counts. An attacker with high privileges (OVSDB write access) can configure excessive handler or revalidation threads to exhaust system resources. CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H (4.4). Affects FDP, OpenShift OVS RPMs, RHEL-7 ELS, and Fedora openvswitch packages.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "3.6.90"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "openvswitch", "vendor": "redhat"}], "created": "2026-06-04T19:30:21.820935+00:00", "title": "Open vSwitch Thread Allocation Exploit Causing Denial of Service", "updated": "2026-06-05T10:10:59.353796+00:00", "vendors": ["redhat", "redhat$PRODUCT$openvswitch"]}