CVE-2024-21626

HIGHNVD 8.68.6
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This high-severity CVE scores 8.6 under NVD CVSS v3. EPSS exploit probability: 19% (97th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Weaponized
8.6EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Public exploit code is available (Metasploit, other public proof-of-concept code)
CISA-KEV: Not listedEPSS PROB: 19%CVSS: 8.6Exploit: Metasploit · other public PoCExposed services: Not assessed

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
8.6HIGHmedium confidence
EG Risk
65
EG Risk 65/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity86% × 45%
The EG Score, 8.6 of 10.
Exploitation65% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 2 (Weaponized): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
19%
EPSS %ILE
97th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

January 31, 2024

Last Modified

September 17, 2026

Advisory Details (8)

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

[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/
Web page

[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/
Web pageMentions a patch (unverified)

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

https://lists.debian.org/debian-lts-announce/2024/02/msg00005.html
GitHub advisoryMentions a patch (unverified)

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
Web page

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

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

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 / EcosystemFix (by version range) / PatchReleasedSource
ubunturunc (1.1.7-0ubuntu2.2) @ mantic2026-09-17ubuntu
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
redhatrunc-4:1.1.12-1.el9_22024-02-08redhat
redhatcontainer-tools:4.0-8060020240205133014.3b538bd82024-02-08redhat
redhatcontainer-tools:rhel8-8060020240206151655.3b538bd82024-02-08redhat
redhatrunc-3:1.1.2-3.1.rhaos4.11.el82024-02-08redhat
redhatcontainer-tools:rhel8-8080020240206143933.0f77c1b72024-02-08redhat
redhatrunc-3:1.1.6-5.1.rhaos4.12.el82024-02-08redhat
redhatcontainer-tools:4.0-8090020240201111813.d7b6f4b72024-02-08redhat
redhatrunc-4:1.1.12-1.el9_02024-02-08redhat
redhatcontainer-tools:rhel8-8090020240201111839.d7b6f4b72024-02-08redhat
redhatcontainer-tools:2.0-8020020240206120705.28c387602024-02-08redhat
redhatcontainer-tools:3.0-8040020240207051234.c0c392d52024-02-08redhat
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.rhaos4.14.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

(6 across 6 ecosystems)
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
runc1.0.0~rc6+dfsg1-3, 1.0.0~rc6+dfsg1-3+deb10u1, 1.0.0~rc6+dfsg1-3+deb10u2
  • every version up to 1.0.0~rc6+dfsg1-3+deb10u3: fixed in 1.0.0~rc6+dfsg1-3+deb10u3
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
runc1.0.0~rc93+ds1-5, 1.0.0~rc93+ds1-5+deb11u1, 1.0.0~rc93+ds1-5+deb11u2
  • every version up to 1.0.0~rc93+ds1-5+deb11u3: fixed in 1.0.0~rc93+ds1-5+deb11u3
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
runc1.1.5+ds1-1
  • every version up to 1.1.5+ds1-1+deb12u1: fixed in 1.1.5+ds1-1+deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
runc—
  • every version up to 1.1.12+ds1-1: fixed in 1.1.12+ds1-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
runc—
  • every version up to 1.1.12+ds1-1: fixed in 1.1.12+ds1-1
—
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/opencontainers/runc—
  • 1.0.0-rc93 up to 1.1.12: fixed in 1.1.12
—

Weakness Classification(3)

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

Additional Vendor Advisories

(10)

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 9× in last 7d / 26× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 95 of 189 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 5 repeat rows among the latest 100 are merged into the row they repeat. The 94 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:30 UTCEPSS rescoreEPSS 19% · 97th percentile
  2. 2026-10-12 18:03 UTCEG score recompute
  3. 2026-10-11 21:28 UTCEG score recompute
  4. 2026-10-11 16:21 UTCEG score recompute
  5. 2026-10-11 13:45 UTCEPSS rescoreEPSS 19% · 97th percentile
  6. 2026-10-10 19:58 UTCEPSS rescoreEPSS 19% · 97th percentile
  7. 2026-10-09 20:05 UTCEPSS rescoreEPSS 19% · 97th percentile
  8. 2026-10-08 17:07 UTCEPSS rescoreEPSS 19% · 97th percentile
  9. 2026-10-07 23:46 UTCEPSS rescoreEPSS 19% · 97th percentile
  10. 2026-10-07 06:24 UTCOSV refresh
  11. 2026-10-06 15:15 UTCEPSS rescoreEPSS 19% · 97th percentile
  12. 2026-10-05 17:41 UTCEPSS rescoreEPSS 19% · 97th percentile
  13. 2026-10-03 14:23 UTCEPSS rescoreEPSS 19% · 97th percentile
  14. 2026-10-01 19:48 UTCEPSS rescoreEPSS 19% · 97th percentile
  15. 2026-09-30 16:56 UTCEG score recompute
  16. 2026-09-30 15:01 UTCEPSS rescoreEPSS 19% · 97th percentile
  17. 2026-09-29 15:17 UTCEPSS rescoreEPSS 19% · 97th percentile
  18. 2026-09-28 13:49 UTCEPSS rescoreEPSS 18% · 97th percentile
  19. 2026-09-24 14:01 UTCEPSS rescoreEPSS 18% · 97th percentile
  20. 2026-09-23 13:46 UTCEPSS rescoreEPSS 18% · 97th percentile
  21. 2026-09-17 12:19 UTCVendor advisory
  22. 2026-09-17 12:12 UTCEG score recompute
  23. 2026-09-17 12:12 UTCVendor advisory
  24. 2026-09-16 14:06 UTCEPSS rescoreEPSS 18% · 97th percentile
  25. 2026-09-16 05:11 UTCEPSS rescoreEPSS 18% · 97th percentile
Show 70 more
  1. 2026-09-15 03:08 UTCEPSS rescoreEPSS 18% · 97th percentile
  2. 2026-09-12 14:59 UTCEPSS rescoreEPSS 18% · 97th percentile
  3. 2026-09-12 08:40 UTCOSV refresh
  4. 2026-09-11 14:51 UTCEPSS rescoreEPSS 18% · 97th percentile
  5. 2026-09-11 09:34 UTCEPSS rescoreEPSS 18% · 97th percentile
  6. 2026-09-08 21:58 UTCEPSS rescoreEPSS 18% · 97th percentile
  7. 2026-09-07 15:59 UTCEPSS rescoreEPSS 18% · 97th percentile
  8. 2026-09-06 13:46 UTCEPSS rescoreEPSS 18% · 96th percentile
  9. 2026-09-05 15:26 UTCEPSS rescoreEPSS 18% · 97th percentile
  10. 2026-09-04 13:58 UTCEPSS rescoreEPSS 18% · 96th percentile
  11. 2026-09-04 05:05 UTCEPSS rescoreEPSS 18% · 96th percentile
  12. 2026-09-02 14:10 UTCEPSS rescoreEPSS 18% · 96th percentile
  13. 2026-09-01 13:52 UTCEPSS rescoreEPSS 18% · 96th percentile
  14. 2026-08-30 19:15 UTCEPSS rescoreEPSS 18% · 96th percentile
  15. 2026-08-30 01:20 UTCEPSS rescoreEPSS 18% · 97th percentile
  16. 2026-08-28 21:39 UTCEPSS rescoreEPSS 18% · 97th percentile
  17. 2026-08-27 14:23 UTCEPSS rescoreEPSS 18% · 96th percentile
  18. 2026-08-26 14:44 UTCEPSS rescoreEPSS 18% · 96th percentile
  19. 2026-08-25 13:47 UTCEPSS rescoreEPSS 18% · 96th percentile
  20. 2026-08-24 13:32 UTCVendor advisory
  21. 2026-08-24 12:28 UTCEG score recompute
  22. 2026-08-24 12:28 UTCVendor advisory
  23. 2026-08-23 00:17 UTCEPSS rescoreEPSS 18% · 96th percentile
  24. 2026-08-21 23:47 UTCEPSS rescoreEPSS 18% · 96th percentile
  25. 2026-08-20 22:53 UTCEPSS rescoreEPSS 18% · 96th percentile
  26. 2026-08-20 14:00 UTCVendor advisory
  27. 2026-08-20 12:46 UTCEG score recompute
  28. 2026-08-20 12:46 UTCVendor advisory
  29. 2026-08-19 17:02 UTCEPSS rescoreEPSS 18% · 96th percentile
  30. 2026-08-18 13:46 UTCEPSS rescoreEPSS 18% · 96th percentile
  31. 2026-08-18 12:24 UTCEG score recompute
  32. 2026-08-18 12:24 UTCVendor advisory
  33. 2026-08-17 13:45 UTCEPSS rescoreEPSS 18% · 96th percentile
  34. 2026-08-17 12:22 UTCVendor advisory
  35. 2026-08-17 12:14 UTCEG score recompute
  36. 2026-08-17 12:14 UTCVendor advisory
  37. 2026-08-16 14:54 UTCEPSS rescoreEPSS 18% · 96th percentile
  38. 2026-08-16 02:12 UTCEPSS rescoreEPSS 18% · 96th percentile
  39. 2026-08-15 01:28 UTCEPSS rescoreEPSS 18% · 96th percentile
  40. 2026-08-14 13:28 UTCVendor advisory
  41. 2026-08-14 12:30 UTCEG score recompute
  42. 2026-08-14 12:30 UTCVendor advisory
  43. 2026-08-13 21:58 UTCEPSS rescoreEPSS 18% · 96th percentile
  44. 2026-08-13 12:30 UTCEG score recompute
  45. 2026-08-13 12:30 UTCVendor advisory
  46. 2026-08-12 13:49 UTCEPSS rescoreEPSS 18% · 96th percentile
  47. 2026-08-11 13:40 UTCEPSS rescoreEPSS 18% · 96th percentile
  48. 2026-08-11 12:26 UTCEG score recompute
  49. 2026-08-11 12:26 UTCVendor advisory
  50. 2026-08-08 16:35 UTCEPSS rescoreEPSS 18% · 96th percentile
  51. 2026-08-06 13:45 UTCEPSS rescoreEPSS 18% · 96th percentile
  52. 2026-08-05 19:15 UTCEPSS rescoreEPSS 18% · 96th percentile
  53. 2026-08-04 15:08 UTCEPSS rescoreEPSS 18% · 96th percentile
  54. 2026-08-04 10:36 UTCEPSS rescoreEPSS 18% · 96th percentile
  55. 2026-08-03 10:34 UTCEPSS rescoreEPSS 18% · 96th percentile
  56. 2026-08-01 14:06 UTCOSV refresh
  57. 2026-08-01 04:14 UTCEPSS rescoreEPSS 18% · 96th percentile
  58. 2026-07-30 16:26 UTCEPSS rescoreEPSS 18% · 96th percentile
  59. 2026-07-30 01:29 UTCEPSS rescoreEPSS 18% · 96th percentile
  60. 2026-07-28 15:34 UTCEPSS rescoreEPSS 18% · 96th percentile
  61. 2026-07-26 14:53 UTCEPSS rescoreEPSS 18% · 96th percentile
  62. 2026-07-25 14:16 UTCEPSS rescoreEPSS 18% · 96th percentile
  63. 2026-07-24 14:16 UTCEPSS rescoreEPSS 18% · 96th percentile
  64. 2026-07-23 14:17 UTCEPSS rescoreEPSS 18% · 96th percentile
  65. 2026-07-23 02:33 UTCEG score recompute
  66. 2026-07-22 23:20 UTCEG score recompute
  67. 2026-07-22 14:07 UTCEPSS rescoreEPSS 18% · 96th percentile
  68. 2026-07-21 15:23 UTCEPSS rescoreEPSS 18% · 96th percentile
  69. 2026-07-20 17:06 UTCEPSS rescoreEPSS 18% · 96th percentile
  70. 2026-07-19 14:30 UTCEPSS rescoreEPSS 18% · 96th percentile

Publicly available exploits

(9 references)

Public exploit code is referenced for this CVE (1 Metasploit module, 8 GitHub PoCs). Defenders should treat patch urgency accordingly.

  • Metasploitexploit/linux/local/runc_cwd_priv_esc✓ verified
    Published Feb 5, 2024

    runc (docker) File Descriptor Leak Privilege Escalation

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

    POC

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

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

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

    Container Runtime Meetup #5 のLT用のデモ

    Open source ↗
  • GitHub PoCzhangguanzhang/CVE-2024-21626
    Published Feb 2, 2024
    Open source ↗
  • GitHub PoCNitroCao/CVE-2024-21626
    Published Feb 1, 2024

    PoC and Detection for CVE-2024-21626

    Open source ↗

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2024-21626?
CVE-2024-21626 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2024-21626 published?
The CVE record for CVE-2024-21626 was published on January 31, 2024. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 17, 2026; the record at its source may have been updated since.
Is CVE-2024-21626 actively exploited?
CVE-2024-21626 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model places it in Tier 2 (Weaponized), which is not evidence of exploitation: a Metasploit module exists for it. EchelonGraph does not test whether exploit code works. FIRST EPSS estimates a 19% probability of exploitation in the next 30 days (97th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2024-21626?
CVE-2024-21626 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2024-21626?
A fix for CVE-2024-21626 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2024-21626 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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