{"id":"CVE-2021-30465","aliases":["GHSA-c3xm-pvg7-gh7r","GO-2022-0914"],"url":"https://o3.security/vulnerability/CVE-2021-30465","summary":"mount destinations can be swapped via symlink-exchange to cause mounts outside the rootfs","details":"runc before 1.0.0-rc95 allows a Container Filesystem Breakout via Directory Traversal. To exploit the vulnerability, an attacker must be able to create multiple containers with a fairly specific mount configuration. The problem occurs via a symlink-exchange attack that relies on a race condition.","published":"2021-05-27T13:15:08.077Z","modified":"2026-07-08T05:59:23.301451582Z","cvss":{"score":8.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Go","name":"github.com/opencontainers/runc","fixedVersion":"1.0.0-rc95"}],"fix":{"url":"https://github.com/opencontainers/runc/commit/0ca91f44f1664da834bc61115a849b56d22f595f","label":"opencontainers/runc@0ca91f4"},"references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/03/msg00023.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/35ZW6NBZSBH5PWIT7JU4HXOXGFVDCOHH/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4HOARVIT47RULTTFWAU7XBG4WY6TDDHV/"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/05/19/2"},{"type":"ADVISORY","url":"https://github.com/opencontainers/runc/releases"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202107-26"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210708-0003/"},{"type":"REPORT","url":"https://bugzilla.opensuse.org/show_bug.cgi?id=1185405"},{"type":"FIX","url":"https://github.com/opencontainers/runc/commit/0ca91f44f1664da834bc61115a849b56d22f595f"},{"type":"FIX","url":"https://github.com/opencontainers/runc/security/advisories/GHSA-c3xm-pvg7-gh7r"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T05:59:23.301451582Z"}}