{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-102253 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-102253 is a high-severity denial of service vulnerability in esnet iperf3, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-102253 and fix it if it is affected.\n\nWhat it is: CVE-2026-102253 is a high-severity denial of service vulnerability in esnet iperf3, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-102253 in the wild and no public exploit code.\n\nAffected product: esnet iperf3. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-102253/ (Markdown: https://insights.sbomify.com/CVE-2026-102253/index.md)","id":"CVE-2026-102253","markdown":"https://insights.sbomify.com/CVE-2026-102253/index.md","name":"CVE-2026-102253","record":{"aliases":["ALSA-2026:88207","AZL-105051","BELL-CVE-2026-102253","DEBIAN-CVE-2026-102253","GHSA-jhpr-vprv-wh8f","MINI-r7jc-pp9j-682p","RLSA-2026:88207","UBUNTU-CVE-2026-102253"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Network performance tool","requires_auth":"none","summary":"Remote attackers can cause a permanent denial of service in iperf3 servers by triggering an infinite loop in the UDP receive worker with crafted packets.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-835","name":"Loop with Unreachable Exit Condition"}],"description":"iperf3 versions prior to 3.22 contains a denial of service vulnerability that allows unauthenticated remote attackers to crash-loop the server's UDP receive worker into an unrecoverable infinite loop by sending a single crafted control-channel parameter message followed by one 16-byte UDP datagram. Attackers can permanently pin the affected per-stream receive thread at approximately 100% CPU usage, rendering the server unusable until forcibly killed with SIGKILL, as the process does not respond to normal control-channel closure.","ecosystems":["AlmaLinux:10","Rocky Linux:10"],"exploits":{"exploitdb":0,"first_seen":"2026-10-07","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-10-07T18:08:16Z","kind":"github_poc","ref":"https://github.com/Ravi-lk/CVE-2026-102253-POC","stars":0,"title":"DOS infinite-loop Vulnerability POC"}],"tier":"poc_unverified"},"has_fix":true,"headline":"iperf3 \u003c 3.22 UDP Receive Worker Infinite Loop DoS","id":"CVE-2026-102253","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"Server-side request forgery in SMA1000","id":"CVE-2026-102255"},"packages":[{"ecosystem":"AlmaLinux:10","fixed":["3.17.1-6.el10_2.2"],"introduced":["0"],"last_affected":[],"package":"iperf3","purl":"pkg:rpm/almalinux/iperf3","source":"ALSA-2026:88207"},{"ecosystem":"Rocky Linux:10","fixed":["0:3.17.1-6.el10_2.2"],"introduced":["0"],"last_affected":[],"package":"iperf3","purl":"pkg:rpm/rocky-linux/iperf3?distro=rocky-linux-10\u0026epoch=0","source":"RLSA-2026:88207"}],"prev":{"headline":"Path Traversal in VMDK Extractor in OSV-SCALIBR","id":"CVE-2026-102252"},"products":["iperf3"],"published":"2026-09-29","related":[],"sources":[{"class":"attribution","licence":"MIT","name":"AlmaLinux","prefix":"ALSA"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"BSD","name":"Rocky Linux","prefix":"RLSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-01","vendors":["esnet"]},"summary":"Remote attackers can cause a permanent denial of service in iperf3 servers by triggering an infinite loop in the UDP receive worker with crafted packets.","url":"https://insights.sbomify.com/CVE-2026-102253/"}