{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-18103 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-18103 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-18103 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 6, published on 4 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-18103 and fix it if it is affected.\n\nWhat it is: CVE-2026-18103 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 6, published on 4 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-18103 in the wild and no public exploit code.\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-2026-18103/ (Markdown: https://insights.sbomify.com/CVE-2026-18103/index.md)","id":"CVE-2026-18103","markdown":"https://insights.sbomify.com/CVE-2026-18103/index.md","name":"CVE-2026-18103","record":{"aliases":["DEBIAN-CVE-2026-18103","GHSA-wq4j-5vp3-jcrx","UBUNTU-CVE-2026-18103"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"DHCP server","requires_auth":"high_privilege","summary":"Remote attackers can cause persistent denial of service in the DHCP server by sending crafted OMAPI requests with overly long MAC addresses.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[],"cvss":{"score":4.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-120","name":"Buffer Copy without Checking Size of Input"}],"description":"A flaw was found in dhcp-server. A remote attacker with network access to the OMAPI (Open Management Application Programming Interface) port, especially if not secured with TSIG (Transaction Signature) key authentication, could send a specially crafted lease creation request. This request, containing an overly long InfiniBand MAC address, triggers a buffer overflow in the `print_hw_addr()` function. Successful exploitation leads to a persistent denial of service (DoS), causing the `dhcpd` service to crash and preventing it from restarting without manual intervention.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Dhcp-server: dhcp-server: persistent denial of service due to buffer overflow via omapi","id":"CVE-2026-18103","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"IBM Db2 Mirror for i is vulnerable to obtain sensitive information []","id":"CVE-2026-18104"},"packages":[],"prev":{"headline":"IBM i Buffer Overflow","id":"CVE-2026-18102"},"products":["Red Hat Enterprise Linux 6","Red Hat Enterprise Linux 7","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 9"],"published":"2026-08-04","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":"2026-08-05","vendors":["Red Hat"]},"summary":"Remote attackers can cause persistent denial of service in the DHCP server by sending crafted OMAPI requests with overly long MAC addresses.","url":"https://insights.sbomify.com/CVE-2026-18103/"}