{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-124740 in the wild and no public exploit code.","exposure":"An affected version is exposed as installed. No special setting or call is needed.","fix":"No fix has been published for CVE-2026-124740 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-124740 is a medium-severity use after free vulnerability in Red Hat Enterprise Linux 6, published on 11 Nov 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-124740 and fix it if it is affected.\n\nWhat it is: CVE-2026-124740 is a medium-severity use after free vulnerability in Red Hat Enterprise Linux 6, published on 11 Nov 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-124740 in the wild and no public exploit code.\nExposure: An affected version is exposed as installed. No special setting or call is needed.\n\nAffected product: Red Hat Enterprise Linux 6. 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-2026-124740/ (Markdown: https://insights.sbomify.com/CVE-2026-124740/index.md)","id":"CVE-2026-124740","markdown":"https://insights.sbomify.com/CVE-2026-124740/index.md","name":"CVE-2026-124740","record":{"aliases":["GHSA-9f82-ccff-m2qq"],"analysis":{"component_type":"operating_system","exploitable_when_present":false,"fix_type":"no_fix_stated","impacts":["denial_of_service","data_read"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"embedded Unix utilities","requires_auth":"none","requires_specific_call":false,"summary":"A malicious local network DHCPv6 server can crash BusyBox udhcpc6 clients or leak address data via crafted replies.","user_interaction":"not_required","vuln_class":"use_after_free","vulnerable_functions":[]},"analysis_generated_by":"sbomify/insights-2b-fp8","assigner":"redhat","cpe":[],"cvss":{"score":4.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"A flaw was found in BusyBox's udhcpc6 DHCPv6 client. A malicious server on the local network can trigger a use-after-free condition by responding with a crafted Dynamic Host Configuration Protocol for IPv6 (DHCPv6) reply packet lacking usable address options. This issue causes the client to read stale heap memory, which can result in a Denial of Service (DoS) due to an application crash or disclose previously assigned network address data in subsequent discovery requests.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Busybox: use-after-free of requested_ipv6 in udhcpc6","id":"CVE-2026-124740","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Busybox: stack buffer overflow in udhcpc6 send_d6_renew() and send_d6_release()","id":"CVE-2026-124741"},"nickname":null,"packages":[],"prev":{"headline":"Busybox: httpd stack buffer overflow via an \"i:\" rule in a subdirectory httpd.conf","id":"CVE-2026-124739"},"products":["Red Hat Enterprise Linux 6","Red Hat Hardened Images"],"published":"2026-11-11","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-11-12","vendors":["Red Hat"]},"summary":"A malicious local network DHCPv6 server can crash BusyBox udhcpc6 clients or leak address data via crafted replies.","url":"https://insights.sbomify.com/CVE-2026-124740/"}