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.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-3735-1 runc security update
Debian DSA Debian DSA DSA-5615-1 runc security update
EUVD EUVD EUVD-2024-0459 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.
Github GHSA Github GHSA GHSA-xr7r-f8xq-vfvv runc vulnerable to container breakout through process.cwd trickery and leaked fds
Ubuntu USN Ubuntu USN USN-6619-1 runC vulnerability
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

References
Link Providers
http://packetstormsecurity.com/files/176993/runc-1.1.11-File-Descriptor-Leak-Privilege-Escalation.html cve-icon cve-icon
http://www.openwall.com/lists/oss-security/2024/02/01/1 cve-icon cve-icon
http://www.openwall.com/lists/oss-security/2024/02/02/3 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2024:0645 cve-icon
https://access.redhat.com/errata/RHSA-2024:0662 cve-icon
https://access.redhat.com/errata/RHSA-2024:0666 cve-icon
https://access.redhat.com/errata/RHSA-2024:0670 cve-icon
https://access.redhat.com/errata/RHSA-2024:0684 cve-icon
https://access.redhat.com/errata/RHSA-2024:0717 cve-icon
https://access.redhat.com/errata/RHSA-2024:0748 cve-icon
https://access.redhat.com/errata/RHSA-2024:0752 cve-icon
https://access.redhat.com/errata/RHSA-2024:0755 cve-icon
https://access.redhat.com/errata/RHSA-2024:0756 cve-icon
https://access.redhat.com/errata/RHSA-2024:0757 cve-icon
https://access.redhat.com/errata/RHSA-2024:0758 cve-icon
https://access.redhat.com/errata/RHSA-2024:0759 cve-icon
https://access.redhat.com/errata/RHSA-2024:0760 cve-icon
https://access.redhat.com/errata/RHSA-2024:0764 cve-icon
https://access.redhat.com/errata/RHSA-2024:10149 cve-icon
https://access.redhat.com/errata/RHSA-2024:10520 cve-icon
https://access.redhat.com/errata/RHSA-2024:10525 cve-icon
https://access.redhat.com/errata/RHSA-2024:10841 cve-icon
https://access.redhat.com/errata/RHSA-2024:1270 cve-icon
https://access.redhat.com/errata/RHSA-2024:4597 cve-icon
https://access.redhat.com/errata/RHSA-2025:0115 cve-icon
https://access.redhat.com/errata/RHSA-2025:0650 cve-icon
https://access.redhat.com/errata/RHSA-2025:1711 cve-icon
https://access.redhat.com/errata/RHSA-2025:2441 cve-icon
https://access.redhat.com/errata/RHSA-2025:2701 cve-icon
https://access.redhat.com/errata/RHSA-2025:2710 cve-icon
https://access.redhat.com/security/cve/CVE-2024-21626 cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2258725 cve-icon
https://github.com/opencontainers/runc/commit/02120488a4c0fc487d1ed2867e901eeed7ce8ecf cve-icon cve-icon
https://github.com/opencontainers/runc/releases/tag/v1.1.12 cve-icon cve-icon
https://github.com/opencontainers/runc/security/advisories/GHSA-xr7r-f8xq-vfvv cve-icon cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2024/02/msg00005.html cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/[email protected]/message/2NLXNE23Q5ESQUAI22Z7A63JX2WMPJ2J/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/[email protected]/message/SYMO3BANINS6RGFQFKPRG4FIOJ7GWYTL/ cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2024-21626 cve-icon
https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-21626.json cve-icon
https://www.cve.org/CVERecord?id=CVE-2024-21626 cve-icon
https://www.vicarius.io/vsociety/posts/leaky-vessels-part-1-cve-2024-21626 cve-icon
History

Wed, 16 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.03057}

epss

{'score': 0.03846}


Mon, 14 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.0331}

epss

{'score': 0.03057}


Thu, 15 May 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 27 Feb 2025 15:00:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:openshift:4.15::el8

Thu, 13 Feb 2025 17:45:00 +0000

Type Values Removed Values Added
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. 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.

Thu, 12 Dec 2024 15:15:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:openshift:4.15::el9

Thu, 05 Dec 2024 15:15:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:openshift:4.14::el9

Wed, 04 Dec 2024 02:45:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:openshift:4.17::el9

Wed, 27 Nov 2024 15:15:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:openshift:4.16::el9

Fri, 22 Nov 2024 12:00:00 +0000


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-11T12:04:54.220Z

Reserved: 2023-12-29T03:00:44.953Z

Link: CVE-2024-21626

cve-icon Vulnrichment

Updated: 2024-08-19T07:48:05.378Z

cve-icon NVD

Status : Modified

Published: 2024-01-31T22:15:53.780

Modified: 2026-07-20T12:16:55.640

Link: CVE-2024-21626

cve-icon Redhat

Severity : Important

Publid Date: 2024-01-31T20:01:00Z

Links: CVE-2024-21626 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses