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HIGH

CVE-2024-21626

CVSS v3

8.6

HIGH

EPSS Score

18.9 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • github.com/opencontainers/runcGofrom 1.0.0-rc93 · fixed in 1.1.12
  • aardvark-dnsAlmaLinux:8all versions · fixed in 2:1.7.0-1.module_el8.9.0+3657+d86e192f
  • buildahAlmaLinux:8all versions · fixed in 1:1.31.3-3.module_el8.9.0+3717+81096349and 1 other package
  • cockpit-podmanAlmaLinux:8all versions · fixed in 75-1.module_el8.9.0+3643+9234dc3b
  • conmonAlmaLinux:8all versions · fixed in 3:2.1.8-1.module_el8.9.0+3643+9234dc3b
  • container-selinuxAlmaLinux:8all versions · fixed in 2:2.221.0-1.module_el8.9.0+3643+9234dc3b
  • containernetworking-pluginsAlmaLinux:8all versions · fixed in 1:1.3.0-8.module_el8.9.0+3717+81096349
  • containers-commonAlmaLinux:8all versions · fixed in 2:1-71.module_el8.9.0+3717+81096349

14 more package ranges on OSV.dev

Vendor advisories

  • CVE-2024-21626 Red Hat Product Security2,004 products fixed · 38 known affected

    runc: file descriptor leak

    ocp-tools-4/jenkins-agent-base-rhel8 as a component of OpenShift Developer Tools and Services · ocp-tools-4/jenkins-rhel8 as a component of OpenShift Developer Tools and Services · kepler-container as a component of Power monitoring for Red Hat OpenShift

  • RHSA-2025:2701 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.13.56 bug fix and security update

  • RHSA-2025:2710 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.14.49 bug fix and security update

  • RHSA-2025:2441 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.12.74 bug fix and security update

  • RHSA-2025:1711 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.15.46 bug fix and security update

  • RHEA-2024:6124 Red Hat Product Security18 products fixed

    Red Hat Enhancement Advisory: Red Hat build of MicroShift 4.18.1 security update

23 more advisories

Full record on NVD

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

Published
2024-01-31

Frequently asked questions

What is CVE-2024-21626?

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.

Is CVE-2024-21626 actively exploited?

Active exploitation of CVE-2024-21626 has not been confirmed. Its EPSS score was 18.9% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-21626?

CVE-2024-21626 has a CVSS v3 base score of 8.6 (HIGH severity).

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