CVE-2024-21626VulnerabilityPublished 12 Dec 2024Updated 29 Oct 2026

Red Hat Security Advisory: OpenShift Container Platform 4.15.41 security update

Affects Red HatSource GCVE Database

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Public exploit available (Metasploit) · 18% EPSS.

Data as of 29 Oct 2026, 10:36 UTC

Severity

High

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 18.9% chance of exploitation in 30 days – higher than 97% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

Disclosed: evidence found.
CVE published 12 Dec 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
1 Metasploit module
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

AI-suggested

Red Hat has released updated MicroShift 4.15.41 RPM packages and container images that fix the file descriptor leak vulnerability. Users should apply these updates promptly when they become available in the RPM repository. Detailed installation instructions are provided in Red Hat's MicroShift documentation. No additional mitigation actions are indicated by the vendor advisory.

Description

Red Hat OpenShift Container Platform and its lightweight edge variant MicroShift have a security update addressing a file descriptor leak vulnerability in runc (CVE-2024-21626). This vulnerability could lead to resource leakage affecting container runtime stability. The update is provided in MicroShift version 4.15.41 RPM packages. Red Hat rates the security impact as Important and classifies the severity as high. Public exploit code exists in Metasploit, but no known active exploitation in the wild is reported. Users of Red Hat build of MicroShift 4.15 are advised to apply the updated packages and container images as soon as they are available.

Impact

The vulnerability involves a file descriptor leak in runc, which may lead to resource exhaustion or instability in container runtimes. This can degrade system performance or cause denial of service conditions in affected Kubernetes clusters running Red Hat OpenShift or MicroShift. The presence of public exploit code increases the risk of exploitation, although no active exploitation is currently known.

Summary

This advisory addresses a security vulnerability in the runc component used by Red Hat OpenShift Container Platform and MicroShift. The vulnerability (CVE-2024-21626) is a file descriptor leak that could potentially affect container runtime operations. The fix is included in the MicroShift 4.15.41 release RPM packages. Red Hat has rated the update as Important with a high severity level. Public exploit code is available via Metasploit, indicating the vulnerability is exploitable, though no active exploitation has been observed. The advisory directs users to update their MicroShift installations and container images to mitigate this issue.

CWE-200Exposure of Sensitive Information to an Unauthorized Actor (opens in a new tab)
Class weaknessLikelihood of exploit: HighCWE Top 25 (2025): #20OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
MITRE discourages mapping vulnerabilities to this broad entry; the root cause is usually a more specific weakness.
Architecture and Design · Separation of Privilege
Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
OWASP Cheat Sheets
Error Handling (opens in a new tab)
Logging (opens in a new tab)
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V8.3.4 (opens in a new tab)
V14.3.3 (opens in a new tab)
V7.3.3 (opens in a new tab)
Attack patterns
Subverting Environment Variable Values (opens in a new tab)
ICMP Echo Request Ping (opens in a new tab)
TCP SYN Scan (opens in a new tab)
Enumerate Mail Exchange (MX) Records (opens in a new tab)
DNS Zone Transfers (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 29 Oct 2026, 10:09 UTC

Public exploits and detection1 Metasploit module, GitHub proofs of concept

WeaknessesCWE-200

Technical details

References

Community reviews

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