{"id":"CVE-2024-21626","url":"https://www.cyber-defence.io/tools/cve/CVE-2024-21626","generatedAt":"2026-11-04T22:24:03.778Z","title":"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…","description":"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":"2024-01-31T22:15:54.000Z","lastModified":"2026-09-17T12:17:08.000Z","status":"Modified","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","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"},"cwe":["CWE-403","CWE-668","CWE-200"],"affected":["linuxfoundation/runc","fedoraproject/fedora"],"epss":{"score":0.18923,"percentile":0.97301,"date":"2026-11-03","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 18.9%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/176993/runc-1.1.11-File-Descriptor-Leak-Privilege-Escalation.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"security-advisories@github.com"},{"url":"http://www.openwall.com/lists/oss-security/2024/02/01/1","tags":["Mailing List"],"source":"security-advisories@github.com"},{"url":"http://www.openwall.com/lists/oss-security/2024/02/02/3","tags":["Mailing List"],"source":"security-advisories@github.com"},{"url":"https://github.com/opencontainers/runc/commit/02120488a4c0fc487d1ed2867e901eeed7ce8ecf","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/opencontainers/runc/releases/tag/v1.1.12","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/opencontainers/runc/security/advisories/GHSA-xr7r-f8xq-vfvv","tags":["Exploit","Vendor 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BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}