{"answers":{"affected":"It affects 14 products.","exploited":"There is no known exploitation of CVE-2026-42009 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-42009 is a high-severity denial of service vulnerability in Gnu Gnutls, published on 18 May 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-2026-42009 and fix it if it is affected.\n\nWhat it is: CVE-2026-42009 is a high-severity denial of service vulnerability in Gnu Gnutls, published on 18 May 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-2026-42009 in the wild and no public exploit code.\n\nAffected product: Gnu Gnutls. 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-2026-42009/ (Markdown: https://insights.sbomify.com/CVE-2026-42009/index.md)","id":"CVE-2026-42009","markdown":"https://insights.sbomify.com/CVE-2026-42009/index.md","name":"CVE-2026-42009","record":{"aliases":["ALPINE-CVE-2026-42009","AZL-87110","BELL-CVE-2026-42009","DEBIAN-CVE-2026-42009","ECHO-b6c2-c0e5-0816","GHSA-9gx7-g5hv-xjjj"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"GnuTLS library","requires_auth":"none","summary":"A remote attacker can cause a denial of service in GnuTLS by exploiting a flaw in DTLS packet reordering logic that mishandles duplicate sequence numbers.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"gnutls","vendor":"gnu"},{"product":"enterprise_linux","vendor":"redhat"},{"product":"enterprise_linux_for_els","vendor":"redhat"},{"product":"enterprise_linux_for_eus","vendor":"redhat"},{"product":"enterprise_linux_for_ibm_z_systems","vendor":"redhat"},{"product":"enterprise_linux_for_ibm_z_systems_els","vendor":"redhat"},{"product":"enterprise_linux_for_ibm_z_systems_eus","vendor":"redhat"},{"product":"enterprise_linux_for_power_little_endian","vendor":"redhat"},{"product":"enterprise_linux_for_power_little_endian_els","vendor":"redhat"},{"product":"enterprise_linux_for_power_little_endian_eus","vendor":"redhat"},{"product":"enterprise_linux_for_update_services_for_sap_solutions","vendor":"redhat"},{"product":"enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions","vendor":"redhat"},{"product":"hardened_images","vendor":"redhat"},{"product":"openshift_container_platform","vendor":"redhat"}],"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-475","name":"Undefined Behavior for Input to API"}],"description":"A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Gnutls: gnutls: denial of service via dtls packet reordering vulnerability","id":"CVE-2026-42009","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"gnu:gnutls","products":["gnu:gnutls","redhat:enterprise_linux","redhat:enterprise_linux_for_ibm_z_systems","redhat:enterprise_linux_for_ibm_z_systems_eus","redhat:enterprise_linux_for_power_little_endian","redhat:enterprise_linux_for_power_little_endian_eus","redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions","redhat:hardened_images","redhat:openshift_container_platform"],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":41,"next":{"headline":"Gnutls: gnutls: authentication bypass via nul character in username","id":"CVE-2026-42010"},"packages":[],"prev":{"headline":"Auth bypass in OX Dovecot CE","id":"CVE-2026-42008"},"products":["Cert Manager support for Red Hat OpenShift release 1.17","Cert Manager support for Red Hat OpenShift release 1.18","Cert Manager support for Red Hat OpenShift release 1.20","Red Hat AI Inference Server 3.2","Red Hat Discovery 2","Red Hat Enterprise Linux 10","Red Hat Enterprise Linux 10.0 Extended Update Support","Red Hat Enterprise Linux 6","Red Hat Enterprise Linux 7 Extended Lifecycle Support","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support","Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On","Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support","Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On","Red Hat Enterprise Linux 8.8 Telecommunications Update Service","Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions","Red Hat Enterprise Linux 9","Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions","Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions","Red Hat Enterprise Linux 9.6 Extended Update Support","Red Hat Hardened Images","Red Hat OpenShift AI 3.4","Red Hat OpenShift Container Platform 4","Red Hat OpenShift Container Platform 4.12","Red Hat OpenShift Container Platform 4.13","Red Hat OpenShift Container Platform 4.14","Red Hat OpenShift Container Platform 4.15","Red Hat OpenShift Container Platform 4.16","Red Hat OpenShift Container Platform 4.17","Red Hat OpenShift Container Platform 4.18","Red Hat OpenShift Container Platform 4.19","Red Hat OpenShift Container Platform 4.20","Red Hat OpenShift Container Platform 4.21","Red Hat OpenShift Container Platform 4.22","Red Hat Update Infrastructure 5"],"published":"2026-05-18","related":[{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2008-1948","kev_date_added":null,"published":"2008-05-21"},{"cvss_score":9.8,"headline":"Use after free in n/a","id":"CVE-2017-5334","kev_date_added":null,"published":"2017-03-24"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2017-5336","kev_date_added":null,"published":"2017-03-24"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2017-5337","kev_date_added":null,"published":"2017-03-24"},{"cvss_score":9.3,"headline":"Null dereference in n/a","id":"CVE-2008-1949","kev_date_added":null,"published":"2008-05-21"},{"cvss_score":7.8,"headline":"Denial of service in n/a","id":"CVE-2004-2531","kev_date_added":null,"published":"2005-10-25"},{"cvss_score":7.6,"headline":"Use after free in n/a","id":"CVE-2008-2377","kev_date_added":null,"published":"2008-08-08"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-26","vendors":["Red Hat"]},"summary":"A remote attacker can cause a denial of service in GnuTLS by exploiting a flaw in DTLS packet reordering logic that mishandles duplicate sequence numbers.","url":"https://insights.sbomify.com/CVE-2026-42009/"}