CVE-2024-21626

CVE Enrichment

CVSS: 8.6 HIGH
EPSS: 18.92%
EPSS Percentile: 97.24%
CISA KEV: Not listed

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: security-advisories@github.com
Published: 01-Feb-2024 05:15
Last Modified: 17-Sep-2026 19:17
EPSS Date: 2026-10-12
CWE: CWE-403, CWE-668, CWE-200

CVSS Vector


            CVSS:3.1                            AV:L /
                            AC:L /
                            PR:N /
                            UI:R /
                            S:C /
                            C:H /
                            I:H /
                            A:H

Affected Products / Versions

linuxfoundation / runc
Version / affected range: * · before (exclusive) 1.1.12
cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:*
fedoraproject / fedora
Version / affected range: 39
cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*

References

Last enrichment sync: 18-Oct-2026 13:25
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (2)

– in race conditions (CVE-2018-15664), in package managers (CVE-2021-32803), in container escapes (CVE-2024-21626). Any time a tool writes to a user-controlled path without resolving it first, symlinks become a Symlink Flaws in Six AI Coding Assistants Could Expose Files and Enable Code Execution
New vulnerabilities have been revealed in the runC command line tool (CVE-2024-21626) and in BuildKit (CVE-2024-23651, CVE-2024-23652, and CVE-2024-23653). These flaws pose a risk of container escape, meaning that Leaky Vessels Flaws Enable Container Escape in runC and BuildKit

CVE (7)

MITRE ATT&CK (4)

Vendors (9)

Products (13)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.