{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-71217 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-71217 is a high-severity denial of service vulnerability in Red Hat Enterprise Linux 10, published on 11 Aug 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-2026-71217 and fix it if it is affected.\n\nWhat it is: CVE-2026-71217 is a high-severity denial of service vulnerability in Red Hat Enterprise Linux 10, published on 11 Aug 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-2026-71217 in the wild and no public exploit code.\n\nAffected product: Red Hat Enterprise Linux 10. 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-2026-71217/ (Markdown: https://insights.sbomify.com/CVE-2026-71217/index.md)","id":"CVE-2026-71217","markdown":"https://insights.sbomify.com/CVE-2026-71217/index.md","name":"CVE-2026-71217","record":{"aliases":["ALSA-2026:61257","ALSA-2026:61389","ALSA-2026:61680","AZL-95601","BELL-CVE-2026-71217","CLSA-2026-1788532080","CLSA-2026-1788821988","DEBIAN-CVE-2026-71217","GHSA-4jvc-h3x3-w6qj","OESA-2026-3527","RHSA-2026:61257","RHSA-2026:61389","RHSA-2026:61680","RLSA-2026:61257","RLSA-2026:61389","RLSA-2026:61680","UBUNTU-CVE-2026-71217"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Network performance tool","requires_auth":"none","summary":"Remote attackers can cause denial of service on iperf3 servers by sending oversized JSON parameters that trigger resource exhaustion.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"A flaw was found in iperf3. A remote attacker can exploit this vulnerability by sending crafted control-channel JSON with oversized numeric parameters, such as `parallel` and `len`, which are not properly validated by the server. This improper input validation can lead to excessive stream and thread creation, as well as large buffer allocations, causing resource exhaustion. Consequently, this can result in a Denial of Service (DoS) on the affected iperf3 server.","ecosystems":["AlmaLinux:10","AlmaLinux:8","AlmaLinux:9","Red Hat:enterprise_linux:10.2","Red Hat:enterprise_linux:8::appstream","Red Hat:enterprise_linux:9::appstream","Rocky Linux:10","Rocky Linux:8","Rocky Linux:9"],"exploits":{"exploitdb":0,"first_seen":"2026-09-20","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-09-20T13:37:36Z","kind":"github_poc","ref":"https://github.com/Reelix/CVE-2026-71217-PoC","stars":0,"title":"A PoC for CVE-2026-71217"}],"tier":"poc_unverified"},"has_fix":true,"headline":"Denial of service in Red Hat Enterprise Linux 10","id":"CVE-2026-71217","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":15,"n_references":6,"next":{"headline":"Iperf3: unbounded peer-controlled allocation in iperf3 json_read() allows unauthenticated remote memory exhaustion","id":"CVE-2026-71218"},"packages":[{"ecosystem":"AlmaLinux:10","fixed":["3.17.1-6.el10_2.1"],"introduced":["0"],"last_affected":[],"package":"iperf3","purl":"pkg:rpm/almalinux/iperf3","source":"ALSA-2026:61680"},{"ecosystem":"AlmaLinux:8","fixed":["3.5-12.el8_10.1"],"introduced":["0"],"last_affected":[],"package":"iperf3","purl":"pkg:rpm/almalinux/iperf3","source":"ALSA-2026:61257"},{"ecosystem":"AlmaLinux:9","fixed":["3.9-17.el9_8.1"],"introduced":["0"],"last_affected":[],"package":"iperf3","purl":"pkg:rpm/almalinux/iperf3","source":"ALSA-2026:61389"},{"ecosystem":"Red Hat:enterprise_linux:10.2","fixed":["0:3.17.1-6.el10_2.1"],"introduced":["0"],"last_affected":[],"package":"iperf3","purl":"pkg:rpm/redhat/iperf3","source":"RHSA-2026:61680"},{"ecosystem":"Red Hat:enterprise_linux:10.2","fixed":["0:3.17.1-6.el10_2.1"],"introduced":["0"],"last_affected":[],"package":"iperf3-debuginfo","purl":"pkg:rpm/redhat/iperf3-debuginfo","source":"RHSA-2026:61680"},{"ecosystem":"Red Hat:enterprise_linux:10.2","fixed":["0:3.17.1-6.el10_2.1"],"introduced":["0"],"last_affected":[],"package":"iperf3-debugsource","purl":"pkg:rpm/redhat/iperf3-debugsource","source":"RHSA-2026:61680"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.5-12.el8_10.1"],"introduced":["0"],"last_affected":[],"package":"iperf3","purl":"pkg:rpm/redhat/iperf3","source":"RHSA-2026:61257"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.5-12.el8_10.1"],"introduced":["0"],"last_affected":[],"package":"iperf3-debuginfo","purl":"pkg:rpm/redhat/iperf3-debuginfo","source":"RHSA-2026:61257"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.5-12.el8_10.1"],"introduced":["0"],"last_affected":[],"package":"iperf3-debugsource","purl":"pkg:rpm/redhat/iperf3-debugsource","source":"RHSA-2026:61257"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:3.9-17.el9_8.1"],"introduced":["0"],"last_affected":[],"package":"iperf3","purl":"pkg:rpm/redhat/iperf3","source":"RHSA-2026:61389"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:3.9-17.el9_8.1"],"introduced":["0"],"last_affected":[],"package":"iperf3-debuginfo","purl":"pkg:rpm/redhat/iperf3-debuginfo","source":"RHSA-2026:61389"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:3.9-17.el9_8.1"],"introduced":["0"],"last_affected":[],"package":"iperf3-debugsource","purl":"pkg:rpm/redhat/iperf3-debugsource","source":"RHSA-2026:61389"},{"ecosystem":"Rocky Linux:10","fixed":["0:3.17.1-6.el10_2.1"],"introduced":["0"],"last_affected":[],"package":"iperf3","purl":"pkg:rpm/rocky-linux/iperf3?distro=rocky-linux-10\u0026epoch=0","source":"RLSA-2026:61680"},{"ecosystem":"Rocky Linux:8","fixed":["0:3.5-12.el8_10.1"],"introduced":["0"],"last_affected":[],"package":"iperf3","purl":"pkg:rpm/rocky-linux/iperf3?distro=rocky-linux-8\u0026epoch=0","source":"RLSA-2026:61257"},{"ecosystem":"Rocky Linux:9","fixed":["0:3.9-17.el9_8.1"],"introduced":["0"],"last_affected":[],"package":"iperf3","purl":"pkg:rpm/rocky-linux/iperf3?distro=rocky-linux-9\u0026epoch=0","source":"RLSA-2026:61389"}],"prev":{"headline":"Apache SkyWalking: PagerDuty alarm hook transmits the integration routing key over cleartext HTTP","id":"CVE-2026-71216"},"products":["Red Hat Enterprise Linux 10","Red Hat Enterprise Linux 7","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 9"],"published":"2026-08-11","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":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"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":"2026-08-31","vendors":["Red Hat"]},"summary":"Remote attackers can cause denial of service on iperf3 servers by sending oversized JSON parameters that trigger resource exhaustion.","url":"https://insights.sbomify.com/CVE-2026-71217/"}