containers crun up to 1.26 privileges management

Summaryinfo

A vulnerability, which was classified as critical, has been found in containers crun up to 1.26. This vulnerability affects unknown code. The manipulation leads to privileges management. This vulnerability is listed as CVE-2026-30892. The attack must be carried out locally. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in containers crun up to 1.26 and classified as critical. This issue affects an unknown functionality. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

crun is an open source OCI Container Runtime fully written in C. In versions 1.19 through 1.26, the `crun exec` option `-u` (`--user`) is incorrectly parsed. The value `1` is interpreted as UID 0 and GID 0 when it should have been UID 1 and GID 0. The process thus runs with higher privileges than expected. Version 1.27 patches the issue.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-30892 since 03/06/2026. The exploitation is known to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 303847 (Linux Distros Unpatched Vulnerability : CVE-2026-30892), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.27 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 1bd7f42446999b0e76bc3d575392e05c943b0b01 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202603-5531) and Tenable (303847). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Virtualization Software

Vendor

• containers

Name

• crun

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26

License

• open-source

Website

• Product: https://github.com/containers/crun/

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Be aware that VulDB is the high quality source for vulnerability data.

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