{"answers":{"affected":"It affects 4 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-15686 exists.","fix":"Apply the vendor's patch.","what":"CVE-2018-15686 is a high-severity unsafe deserialization vulnerability in Canonical Ubuntu Linux, published on 26 Oct 2018. 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-2018-15686 and fix it if it is affected.\n\nWhat it is: CVE-2018-15686 is a high-severity unsafe deserialization vulnerability in Canonical Ubuntu Linux, published on 26 Oct 2018. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-15686 exists.\n\nAffected product: Canonical Ubuntu Linux. 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-2018-15686/ (Markdown: https://insights.sbomify.com/CVE-2018-15686/index.md)","id":"CVE-2018-15686","markdown":"https://insights.sbomify.com/CVE-2018-15686/index.md","name":"CVE-2018-15686","record":{"aliases":["DEBIAN-CVE-2018-15686","GHSA-86rx-vp92-xvgg","UBUNTU-CVE-2018-15686"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["privilege_escalation","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"systemd init system","requires_auth":"low_privilege","summary":"An attacker can inject arbitrary state during systemd re-execution via NotifyAccess, potentially leading to root privilege escalation or code execution.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"canonical","cpe":[{"product":"ubuntu_linux","vendor":"canonical"},{"product":"debian_linux","vendor":"debian"},{"product":"communications_cloud_native_core_network_function_cloud_native_environment","vendor":"oracle"},{"product":"systemd","vendor":"systemd_project"}],"cvss":{"score":7,"severity":"high","source":"cna","vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"A vulnerability in unit_deserialize of systemd allows an attacker to supply arbitrary state across systemd re-execution via NotifyAccess. This can be used to improperly influence systemd execution and possibly lead to root privilege escalation. Affected releases are systemd versions up to and including 239.","ecosystems":[],"exploits":{"exploitdb":1,"first_seen":"2018-10-29","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2018-10-29","kind":"exploitdb","ref":"45714","stars":null,"title":"systemd - 'reexec' State Injection"},{"date":"2019-10-03T21:26:04Z","kind":"github_poc","ref":"https://github.com/hpcprofessional/remediate_cesa_2019_2091","stars":0,"title":"Remediation task for CVE-2018-15686, CVE-2018-16866, and CVE-2018-16888 affecting SystemD in EL7"}],"tier":"weaponised"},"has_fix":true,"headline":"systemd: reexec state injection: fgets() on overlong lines leads to line splitting","id":"CVE-2018-15686","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux","debian:debian_linux","systemd_project:systemd"],"type":"deserialization","year":"2018"},"n_packages":0,"n_references":11,"next":{"headline":"systemd: chown_one() can dereference symlinks","id":"CVE-2018-15687"},"packages":[],"prev":{"headline":"Electron webPreferences vulnerability can be used to perform remote code execution","id":"CVE-2018-15685"},"products":["systemd"],"published":"2018-10-26","related":[{"cvss_score":9.8,"headline":"SaltStack Salt Authentication Bypass","id":"CVE-2020-11651","kev_date_added":"2021-11-03","published":"2020-04-30"},{"cvss_score":9.8,"headline":"OpenSMTPD Remote Code Execution","id":"CVE-2020-7247","kev_date_added":"2022-03-25","published":"2020-01-29"},{"cvss_score":9.8,"headline":"Exim Out-of-bounds Write","id":"CVE-2019-16928","kev_date_added":"2022-03-03","published":"2019-09-27"},{"cvss_score":9.8,"headline":"Exim Buffer Overflow","id":"CVE-2018-6789","kev_date_added":"2021-11-03","published":"2018-02-08"},{"cvss_score":9.8,"headline":"Oracle Java SE and Java SE Embedded Remote Code Execution","id":"CVE-2015-2590","kev_date_added":"2022-03-03","published":"2015-07-16"},{"cvss_score":9.8,"headline":"Oracle JRE Remote Code Execution","id":"CVE-2013-0422","kev_date_added":"2022-05-25","published":"2013-01-10"},{"cvss_score":9.8,"headline":"Oracle Java SE Runtime Environment (JRE) Arbitrary Code Execution","id":"CVE-2011-3544","kev_date_added":"2022-03-03","published":"2011-10-19"}],"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)"},{"class":"attribution","licence":"GPL-2.0-or-later","name":"Exploit-DB"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2025-06-09","vendors":["systemd"]},"summary":"An attacker can inject arbitrary state during systemd re-execution via NotifyAccess, potentially leading to root privilege escalation or code execution.","url":"https://insights.sbomify.com/CVE-2018-15686/"}