CVE-2024-21626VulnerabilityPublished 7 Feb 2024Updated 29 Oct 2026

Red Hat Security Advisory: runc security update

Affects Red Hat runcSource GCVE Database

Public exploit available (Metasploit) · 18% EPSS : upgrade the Red Hat redhat/runc package to 7.0.0-70.rc10.el7_9 as a priority.

Data as of 29 Oct 2026, 07:15 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.
Patch: Available – fixed in 7.0.0-70.rc10.el7_9

Exploitation evidence

Disclosed: evidence found.
CVE published 7 Feb 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

Upgrade the Red Hat redhat/runc package to 7.0.0-70.rc10.el7_9.

Affected software

Product	Affected	Fixed in
Red Hatredhat/runc`pkg:rpm/redhat/runc`Other threats	Affected >=7.0.0 <7.0.0-70.rc10.el7_9	Fixed in 7.0.0-70.rc10.el7_9

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released updated packages for Red Hat Enterprise Linux 7 variants that fix this vulnerability. Users should apply the security updates as described in the Red Hat advisory RHSA-2024:0717 and the referenced article https://access.redhat.com/articles/11258. Applying these updates will remediate the file descriptor leak issue. No additional mitigation steps are indicated by the vendor.

Description

A security vulnerability identified as CVE-2024-21626 affects the runC container runtime tool used in Red Hat Enterprise Linux 7. The flaw involves a file descriptor leak, which could potentially expose sensitive information or lead to resource exhaustion. Red Hat has issued an important security advisory and released updated packages to address this issue. Public exploit code is available via Metasploit, but there are no known reports of exploitation in the wild. The update is available for multiple Red Hat Enterprise Linux 7 variants including Server, Workstation, IBM z Systems, and Power architectures.

Impact

The vulnerability causes a file descriptor leak in runC, which may lead to information disclosure or resource exhaustion on affected systems. This can impact container runtime stability and security. Public exploit code is available, increasing the risk of exploitation, although no active exploitation has been reported to date.

Summary

CVE-2024-21626 is a vulnerability in the runC container runtime tool that causes a file descriptor leak. This leak could allow unauthorized disclosure of information or resource exhaustion. Red Hat has released security updates for Red Hat Enterprise Linux 7 variants to fix this issue. Public exploit code exists in Metasploit, indicating the vulnerability is exploitable, though no active exploitation has been reported. The advisory rates the severity as Important (high) and provides updated packages for affected platforms.

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

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 29 Oct 2026, 07:14 UTC

Public exploits and detection1 Metasploit module, GitHub proofs of concept

WeaknessesCWE-200

Technical details

References

Community reviews

Related threats