{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-78408 exists.","fix":"Apply the vendor's patch.","what":"CVE-2026-78408 is a high-severity vulnerability in Red Hat Enterprise Linux 10, published on 2 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-78408 and fix it if it is affected.\n\nWhat it is: CVE-2026-78408 is a high-severity vulnerability in Red Hat Enterprise Linux 10, published on 2 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-78408 exists.\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-2026-78408/ (Markdown: https://insights.sbomify.com/CVE-2026-78408/index.md)","id":"CVE-2026-78408","markdown":"https://insights.sbomify.com/CVE-2026-78408/index.md","name":"CVE-2026-78408","record":{"aliases":["ALPINE-CVE-2026-78408","AZL-99393","BELL-CVE-2026-78408","DEBIAN-CVE-2026-78408","ECHO-3f6d-9602-8caa","ROOT-OS-DEBIAN-12-CVE-2026-78408","ROOT-OS-DEBIAN-13-CVE-2026-78408","UBUNTU-CVE-2026-78408"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["privilege_escalation","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux utility","requires_auth":"low_privilege","summary":"An attacker can exploit nsenter to inherit root cgroup migration authority, allowing them to move or terminate unrelated root processes.","user_interaction":"required","vuln_class":"privilege_escalation"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[],"cvss":{"score":7.9,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-775","name":"Missing Release of File Descriptor or Handle after Effective Lifetime"}],"description":"The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve(). Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an attacker-controlled target can inherit root's ability to move host processes between cgroups. After a privileged operator uses --join-cgroup against that target, an unprivileged user can migrate and terminate unrelated root processes.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Util-linux: util-linux: nsenter --join-cgroup leaks root cgroup migration authority","id":"CVE-2026-78408","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"privilege_escalation","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"Util-linux: util-linux: x-mount.subdir detached-tree resolution can escape via intermediate symlinks","id":"CVE-2026-78409"},"packages":[],"prev":{"headline":"Security vulnerabilities have been found in IBM Verify Identity Access and IBM Security Verify Access","id":"CVE-2026-78407"},"products":["Red Hat Enterprise Linux 10","Red Hat Enterprise Linux 7","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 9","Red Hat Hardened Images","Red Hat OpenShift Container Platform 4"],"published":"2026-09-02","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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-21","vendors":["Red Hat"]},"summary":"An attacker can exploit nsenter to inherit root cgroup migration authority, allowing them to move or terminate unrelated root processes.","url":"https://insights.sbomify.com/CVE-2026-78408/"}