CVE-2026-102253

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{"bugzilla": {"description": "iperf3: iperf3: Denial of Service via UDP receive worker infinite loop", "id": "2543638", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2543638"}, "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-835", "details": ["A flaw was found in iperf3. An unauthenticated remote attacker can exploit this issue by sending a crafted control-channel message followed by a specific User Datagram Protocol (UDP) datagram to the server. This causes the UDP receive processing thread to enter an unrecoverable infinite loop, leading to sustained high CPU utilization and a Denial of Service (DoS) condition."], "name": "CVE-2026-102253", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "iperf3", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "iperf3", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "iperf3", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "iperf3", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-09-29T20:11:47Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-102253\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-102253\nhttps://github.com/esnet/iperf/blob/master/RELNOTES.md\nhttps://github.com/esnet/iperf/releases/tag/3.22\nhttps://www.vulncheck.com/advisories/iperf3-udp-receive-worker-infinite-loop-dos"], "threat_severity": "Important"}

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