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

CVE-2024-21626 has a CVSS 3.1 base score of 8.6 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H. EPSS exploitation probability: 5.5%.

Which versions of Runc are affected by CVE-2024-21626?

Alpine Linux: runc fixed in 1.1.12-r0. A patch is available.

Is there a public PoC exploit available for CVE-2024-21626?

Yes, a public proof-of-concept exploit is available for CVE-2024-21626. Prioritise patching immediately. EPSS: 5.5%.

Is there a patch available for CVE-2024-21626?

Yes, a patch is available for CVE-2024-21626. Update the affected software to the latest version immediately.

Runc CVE-2024-21626

HIGH

Exposure of File Descriptor to Unintended Control Sphere ('File Descriptor Leak') (CWE-403)

N/A vendor:alpine

Information Disclosure Fedora Runc Linuxfoundation Fedoraproject

8.6

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness

CWE

CWE-403

Act Now Prioritize within 24-48h. Why: Active threat signals + CRITICAL/HIGH severity.

Patch available 5.5% exploitation probability (EPSS)

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AnalysisNVD

Alpine Linux: runc fixed in 1.1.12-r0

Affected Packages

go github.com/opencontainers/runc fix: 1.1.12

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in go

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.6 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVSS changed

Jun 25, 2026 - 19:22 NVD

8.6 (HIGH)

CVE Published

May 27, 2026 - 22:33 nvd

MEDIUM

Threat Intelligence Overview

EPSS Score

5.5%

Top 10% exploitable

Exploit

POC

Public exploit code exists

Data Quality

6 sources

Confidence: High

NVD

CVE.org

EPSS POC (1)

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC Yes

EPSS 5.5%

Patch available Yes

Active threat Yes

Deciding rule

Active threat signals + CRITICAL/HIGH severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Out-of-Cycle

Exploitation· derived

Active

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +5

CVSS: +43

PoC: +20

Weaponized: +15

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.