Privilege Escalation Vulnerability in crun: Moderate Security Update Required
Summary
RLSA-2026:6622: Moderate: crun security update. Affects crun versions < 0:1.27-1.el10_1. Fixed in 0:1.27-1.el10_1. How to fix ↓
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Background
crun is an Open Container Initiative (OCI) runtime designed for running containers. It is known for its lightweight nature and efficient performance, making it a popular choice in container orchestration environments. However, a recent vulnerability has been identified that could allow unauthorized privilege escalation through improper parsing of the '--user' option.
Vulnerability Detail
The vulnerability, identified as CVE-2026-30892, arises from incorrect parsing of the '--user' option in crun. This flaw can potentially allow an attacker to escalate privileges, gaining unauthorized access to system resources. The ramifications of this vulnerability are significant, as it could lead to unauthorized actions being performed on the host system, compromising its integrity and security.
How To Fix
Minimum fixed version
0:1.27-1.el10_1
This is the first release that contains the fix.
sudo dnf update crunTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can avoid using the '--user' option until the package is updated to mitigate the risk of privilege escalation.
Conclusion
The crun OCI runtime has a moderate vulnerability (CVE-2026-30892) that could lead to privilege escalation due to improper parsing of the '--user' option. It is crucial to update to the patched version to mitigate this risk. Users are encouraged to monitor their applications for vulnerabilities using tools like Vulert.
See every vulnerability recorded for crun →
FAQ
CVE-2026-30892 is a vulnerability in the crun OCI runtime that allows for privilege escalation due to incorrect parsing of the '--user' option.
You can check your crun version by running 'crun --version' in your terminal. If it is below 0:1.27-1.el10_1, it is affected.
The vulnerability can lead to unauthorized privilege escalation, allowing attackers to perform actions on the host system that they should not have access to.
Yes, you can use Vulert, which monitors and alerts for open-source vulnerabilities in your software using just a manifest file like package-lock.json.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
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