CVE-2026-120399

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{"acknowledgement": "Red Hat would like to thank Miroslav Kol\u00e1\u0159 (TSP Data) for reporting this issue.", "bugzilla": {"description": "flightctl-api: flightctl-remote-access: flightctl: Unbounded TLS handshake in ConnContext can block accepting connections", "id": "2564888", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2564888"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1322", "details": ["A flaw was found in flightctl. A TLS handshake is performed synchronously in the HTTP server\u2019s connection-context callback without a deadline. A network-reachable unauthenticated client can stall the handshake and prevent the affected listener from accepting new connections."], "mitigation": {"lang": "en:us", "value": "The services can be recovered by restarting the server and blocking the malicious device at network level.\nAs a temporary workaround, you can schedule a recurrent check on the listener's Recv-Q; when the queue is non-zero, this terminates idle connections that have received almost no data."}, "name": "CVE-2026-120399", "package_state": [{"cpe": "cpe:/a:redhat:edge_manager:1", "fix_state": "Affected", "package_name": "rhem/flightctl-api-rhel10", "product_name": "Red Hat Edge Manager 1"}, {"cpe": "cpe:/a:redhat:edge_manager:1", "fix_state": "Affected", "package_name": "rhem/flightctl-api-rhel9", "product_name": "Red Hat Edge Manager 1"}, {"cpe": "cpe:/a:redhat:edge_manager:1", "fix_state": "Affected", "package_name": "rhem/flightctl-remote-access-rhel10", "product_name": "Red Hat Edge Manager 1"}, {"cpe": "cpe:/a:redhat:edge_manager:1", "fix_state": "Affected", "package_name": "rhem/flightctl-remote-access-rhel9", "product_name": "Red Hat Edge Manager 1"}], "public_date": "2026-11-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-120399\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-120399"], "statement": "In order to exploit this flaw, an attacker must have network access to the agent endpoint; after exploitation, existing connections remain unaffected.", "threat_severity": "Important"}

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