{"id":"CVE-2024-21626","aliases":["GHSA-xr7r-f8xq-vfvv","GO-2024-2491"],"url":"https://o3.security/vulnerability/CVE-2024-21626","summary":"runc container breakout through process.cwd trickery and leaked fds","details":"runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. In runc 1.1.11 and earlier, due to an internal file descriptor leak, an attacker could cause a newly-spawned container process (from runc exec) to have a working directory in the host filesystem namespace, allowing for a container escape by giving access to the host filesystem (\"attack 2\"). The same attack could be used by a malicious image to allow a container process to gain access to the host filesystem through runc run (\"attack 1\"). Variants of attacks 1 and 2 could be also be used to overwrite semi-arbitrary host binaries, allowing for complete container escapes (\"attack 3a\" and \"attack 3b\"). runc 1.1.12 includes patches for this issue.","published":"2024-01-31T21:31:14.391Z","modified":"2026-07-22T05:29:56.981444284Z","cvss":{"score":8.6,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":15,"affectedPackages":[{"ecosystem":"Go","name":"github.com/opencontainers/runc","fixedVersion":"1.1.12"}],"fix":{"url":"https://github.com/opencontainers/runc/commit/02120488a4c0fc487d1ed2867e901eeed7ce8ecf","label":"opencontainers/runc@0212048"},"references":[{"type":"WEB","url":"http://packetstormsecurity.com/files/176993/runc-1.1.11-File-Descriptor-Leak-Privilege-Escalation.html"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/02/01/1"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/02/02/3"},{"type":"WEB","url":"https://github.com/opencontainers/runc/releases/tag/v1.1.12"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/02/msg00005.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2NLXNE23Q5ESQUAI22Z7A63JX2WMPJ2J/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SYMO3BANINS6RGFQFKPRG4FIOJ7GWYTL/"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-21626.json"},{"type":"WEB","url":"https://www.vicarius.io/vsociety/posts/leaky-vessels-part-1-cve-2024-21626"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0645"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0662"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0666"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0670"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0684"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0717"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0748"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0752"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0755"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0756"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0757"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0758"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0759"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0760"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:0764"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:10149"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:10520"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:10525"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:10841"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1270"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:4597"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:0115"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:0650"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:1711"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:2441"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:2701"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:2710"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2024-21626"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/21xxx/CVE-2024-21626.json"},{"type":"ADVISORY","url":"https://github.com/opencontainers/runc/security/advisories/GHSA-xr7r-f8xq-vfvv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-21626"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2258725"},{"type":"FIX","url":"https://github.com/opencontainers/runc/commit/02120488a4c0fc487d1ed2867e901eeed7ce8ecf"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-22T05:29:56.981444284Z"}}