CVE-2024-21626

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under NVD CVSS v3. EPSS exploit probability: 5.1%, top 10% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Weaponized
8.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 18%CVSS: 8.6Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
8.6
EG Score
8.6(medium)
EPSS
96.9%
KEV
Not listed

Published

January 31, 2024

Last Modified

July 2, 2026

Advisory Details (8)

Auto-updated Jun 25, 2026
Patch available. Sources: github_commit, github_release, github.
generic

[SECURITY] Fedora 39 Update: runc-1.1.12-1.fc39 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/[email protected]/message/SYMO3BANINS6RGFQFKPRG4FIOJ7GWYTL/
generic

[SECURITY] Fedora 38 Update: runc-1.1.12-1.fc38 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/[email protected]/message/2NLXNE23Q5ESQUAI22Z7A63JX2WMPJ2J/
generic Patch Available

[SECURITY] [DLA 3735-1] runc security update

https://lists.debian.org/debian-lts-announce/2024/02/msg00005.html
github Patch Available

several container breakouts due to internally leaked fds · Advisory · opencontainers/runc · GitHub

https://github.com/opencontainers/runc/security/advisories/GHSA-xr7r-f8xq-vfvv
github_release Patch Available

runc 1.1.12 -- "Now you're thinking with Portals™!"

Patch available: opencontainers/runc v1.1.12

https://github.com/opencontainers/runc/releases/tag/v1.1.12
github_commit

commit 02120488a4c0 (opencontainers/runc)

Fix landed in opencontainers/runc commit 02120488a4c0 — awaiting tagged release

https://github.com/opencontainers/runc/commit/02120488a4c0fc487d1ed2867e901eeed7ce8ecf
generic

oss-security - Re: Re: runc: CVE-2024-21626: high severity container breakout attack

http://www.openwall.com/lists/oss-security/2024/02/02/3
generic

oss-security - Re: runc: CVE-2024-21626: high severity container breakout attack

http://www.openwall.com/lists/oss-security/2024/02/01/1

Vendor Advisories for CVE-2024-21626(20)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(28)

Vendor / EcosystemFixed in / PatchReleasedSource
ubunturunc (1.1.4-0ubuntu1~18.04.2+esm1) @ bionic2026-05-24ubuntu
redhatopenshift4/ose-docker-builder:v4.13.0-202503111300.p0.gb379980.assembly.stream.el82025-03-20redhat
redhatopenshift4/ose-docker-builder:v4.14.0-202503060906.p0.gb03f3f5.assembly.stream.el82025-03-19redhat
redhatopenshift4/ose-docker-builder:v4.12.0-202503030130.p0.g7c2a284.assembly.stream.el82025-03-13redhat
redhatopenshift4/ose-docker-builder:v4.15.0-202502171304.p0.gb74eb6d.assembly.stream.el82025-02-27redhat
redhatopenshift4/ose-docker-builder-rhel9:v4.16.0-202501160405.p0.g300d9ad.assembly.stream.el92025-01-29redhat
redhatopenshift4/ose-docker-builder-rhel9:v4.17.0-202501052337.p0.gbb33e13.assembly.stream.el92025-01-14redhat
redhatmicroshift-0:4.15.41-202412091343.p0.gcf9680e.assembly.4.15.41.el92024-12-12redhat
redhatmicroshift-0:4.14.42-202411280904.p0.gcf4d04f.assembly.4.14.42.el92024-12-05redhat
redhatmicroshift-0:4.17.7-202411280904.p0.g129334d.assembly.4.17.7.el92024-12-03redhat
redhatmicroshift-0:4.16.24-202411220522.p0.gcc4fedc.assembly.4.16.24.el92024-11-26redhat
redhatjenkins-2-plugins-0:4.15.1718879538-1.el82024-07-17redhat
redhatdocker-2:1.13.1-210.git7d71120.el7_92024-03-12redhat
redhatcontainer-tools:3.0-8040020240207051234.c0c392d52024-02-08redhat
redhatcontainer-tools:4.0-8090020240201111813.d7b6f4b72024-02-08redhat
redhatcontainer-tools:2.0-8020020240206120705.28c387602024-02-08redhat
redhatrunc-4:1.1.12-1.el9_22024-02-08redhat
redhatrunc-3:1.1.6-5.1.rhaos4.12.el82024-02-08redhat
redhatcontainer-tools:4.0-8060020240205133014.3b538bd82024-02-08redhat
redhatcontainer-tools:rhel8-8060020240206151655.3b538bd82024-02-08redhat
redhatrunc-4:1.1.12-1.el9_02024-02-08redhat
redhatrunc-3:1.1.2-3.1.rhaos4.11.el82024-02-08redhat
redhatcontainer-tools:rhel8-8090020240201111839.d7b6f4b72024-02-08redhat
redhatcontainer-tools:rhel8-8080020240206143933.0f77c1b72024-02-08redhat
redhatrunc-4:1.1.12-1.rhaos4.14.el82024-02-07redhat
redhatrunc-0:1.0.0-70.rc10.el7_92024-02-07redhat
redhatrunc-4:1.1.12-1.rhaos4.13.el82024-02-07redhat
redhatrunc-4:1.1.12-1.el9_32024-02-02redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/opencontainers/runc—1.1.12—

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(8)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 40× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-11 08:26 UTCEPSS rescore
  2. 2026-07-09 19:09 UTCEPSS rescore
  3. 2026-07-09 19:09 UTCEPSS rescore
  4. 2026-07-08 15:13 UTCEPSS rescore
  5. 2026-07-07 13:45 UTCEPSS rescore
  6. 2026-07-07 13:45 UTCEPSS rescore
  7. 2026-07-06 16:26 UTCEPSS rescore
  8. 2026-07-05 02:29 UTCEPSS rescore
  9. 2026-07-01 15:05 UTCEPSS rescore
  10. 2026-06-30 23:21 UTCEPSS rescore
  11. 2026-06-30 23:21 UTCEPSS rescore
  12. 2026-06-28 14:06 UTCEPSS rescore
  13. 2026-06-28 14:06 UTCEPSS rescore
  14. 2026-06-28 04:55 UTCEPSS rescore
  15. 2026-06-28 04:55 UTCEPSS rescore
  16. 2026-06-27 03:07 UTCEPSS rescore
  17. 2026-06-27 03:07 UTCEPSS rescore
  18. 2026-06-26 22:07 UTCOSV refresh
  19. 2026-06-25 13:48 UTCEPSS rescore
  20. 2026-06-25 13:48 UTCEPSS rescore
  21. 2026-06-24 14:04 UTCEPSS rescore
  22. 2026-06-24 14:04 UTCEPSS rescore
  23. 2026-06-23 21:32 UTCEPSS rescore
  24. 2026-06-23 21:32 UTCEPSS rescore
  25. 2026-06-21 14:55 UTCEPSS rescore
Show 56 more
  1. 2026-06-21 14:55 UTCEPSS rescore
  2. 2026-06-21 01:58 UTCEPSS rescore
  3. 2026-06-21 01:58 UTCEPSS rescore
  4. 2026-06-19 19:24 UTCEPSS rescore
  5. 2026-06-19 19:24 UTCEPSS rescore
  6. 2026-06-18 17:51 UTCEPSS rescore
  7. 2026-06-18 17:51 UTCEPSS rescore
  8. 2026-06-17 17:52 UTCEPSS rescore
  9. 2026-06-17 17:52 UTCEPSS rescore
  10. 2026-06-16 17:51 UTCEPSS rescore
  11. 2026-06-16 17:51 UTCEPSS rescore
  12. 2026-06-15 17:47 UTCEPSS rescore
  13. 2026-06-13 22:59 UTCEPSS rescore
  14. 2026-06-13 22:59 UTCEPSS rescore
  15. 2026-06-12 23:11 UTCEPSS rescore
  16. 2026-06-11 13:59 UTCEPSS rescore
  17. 2026-06-11 13:59 UTCEPSS rescore
  18. 2026-06-10 22:17 UTCEPSS rescore
  19. 2026-06-10 13:21 UTCEPSS rescore
  20. 2026-06-10 13:21 UTCEPSS rescore
  21. 2026-06-09 09:00 UTCOSV refresh
  22. 2026-06-08 14:16 UTCEPSS rescore
  23. 2026-06-08 14:16 UTCEPSS rescore
  24. 2026-06-07 15:24 UTCEPSS rescore
  25. 2026-06-07 15:24 UTCEPSS rescore
  26. 2026-06-06 13:46 UTCEPSS rescore
  27. 2026-06-06 13:46 UTCEPSS rescore
  28. 2026-06-05 22:46 UTCEPSS rescore
  29. 2026-06-05 22:46 UTCEPSS rescore
  30. 2026-06-05 06:09 UTCEPSS rescore
  31. 2026-06-05 06:09 UTCEPSS rescore
  32. 2026-06-04 13:11 UTCEPSS rescore
  33. 2026-06-04 13:11 UTCEPSS rescore
  34. 2026-06-04 13:11 UTCEPSS rescore
  35. 2026-06-02 20:12 UTCEPSS rescore
  36. 2026-06-02 20:12 UTCEPSS rescore
  37. 2026-06-01 13:51 UTCEPSS rescore
  38. 2026-06-01 13:51 UTCEPSS rescore
  39. 2026-06-01 13:51 UTCEPSS rescore
  40. 2026-05-31 22:30 UTCEPSS rescore
  41. 2026-05-31 22:30 UTCEPSS rescore
  42. 2026-05-31 00:15 UTCEPSS rescore
  43. 2026-05-31 00:15 UTCEPSS rescore
  44. 2026-05-29 13:43 UTCEPSS rescore
  45. 2026-05-29 13:43 UTCEPSS rescore
  46. 2026-05-28 13:44 UTCEPSS rescore
  47. 2026-05-28 13:44 UTCEPSS rescore
  48. 2026-05-28 13:44 UTCEPSS rescore
  49. 2026-05-27 13:40 UTCEPSS rescore
  50. 2026-05-27 13:40 UTCEPSS rescore
  51. 2026-05-26 13:43 UTCEPSS rescore
  52. 2026-05-26 13:43 UTCEPSS rescore
  53. 2026-05-26 07:18 UTCEPSS rescore
  54. 2026-05-26 07:18 UTCEPSS rescore
  55. 2026-05-24 09:22 UTCEG score recompute
  56. 2026-05-24 09:22 UTCVendor advisory

Publicly available exploits

(9 references)

Working exploit code is in the public domain (1 Metasploit module) (8 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCdorser/cve-2024-21626
    First seen Apr 10, 2024
    Open source ↗
  • GitHub PoCKubernetesBachelor/CVE-2024-21626
    First seen Apr 3, 2024

    POC

    Open source ↗
  • GitHub PoCSk3pper/CVE-2024-21626
    First seen Mar 15, 2024
    Open source ↗
  • GitHub PoCV0WKeep3r/CVE-2024-21626-runcPOC
    First seen Feb 5, 2024
    Open source ↗
  • GitHub PoCzhangguanzhang/CVE-2024-21626
    First seen Feb 2, 2024
    Open source ↗
  • GitHub PoCcdxiaodong/CVE-2024-21626
    First seen Feb 2, 2024

    CVE-2024-21626-poc-research-Reappearance-andtodo

    Open source ↗
  • GitHub PoClaysakura/CVE-2024-21626-demo
    First seen Feb 2, 2024

    Container Runtime Meetup #5 のLT用のデモ

    Open source ↗
  • GitHub PoCNitroCao/CVE-2024-21626
    First seen Feb 1, 2024

    PoC and Detection for CVE-2024-21626

    Open source ↗
  • Metasploitexploit/linux/local/runc_cwd_priv_esc✓ verified
    First seen Jan 31, 2024

    runc (docker) File Descriptor Leak Privilege Escalation

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2024-21626?
CVE-2024-21626 is a high vulnerability published on January 31, 2024. 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…
When was CVE-2024-21626 disclosed?
CVE-2024-21626 was first published in the National Vulnerability Database on January 31, 2024, with the most recent update on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-21626 actively exploited?
CVE-2024-21626 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 96.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-21626?
CVE-2024-21626 has a CVSS v4.0 base score of 8.6 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2024-21626?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-21626, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2024-21626

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