Bug 2451576 (CVE-2026-30892)

Summary:	CVE-2026-30892 crun: crun: Privilege escalation due to incorrect parsing of the `--user` option
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in crun, an open-source OCI Container Runtime. A local user can exploit this vulnerability due to incorrect parsing of the `--user` option when using `crun exec`. The value `1` is misinterpreted as root privileges (User ID 0 and Group ID 0) instead of the intended User ID 1 and Group ID 0. This allows a process to run with higher privileges than expected, leading to privilege escalation.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2452162, 2452163
Bug Blocks:

Description OSIDB Bzimport 2026-03-26 01:01:49 UTC

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.

Comment 4 errata-xmlrpc 2026-04-06 03:24:41 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:6622 https://access.redhat.com/errata/RHSA-2026:6622

Comment 5 errata-xmlrpc 2026-04-06 03:35:59 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:6621 https://access.redhat.com/errata/RHSA-2026:6621

Comment 6 errata-xmlrpc 2026-05-19 13:02:37 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:19020 https://access.redhat.com/errata/RHSA-2026:19020

Comment 7 errata-xmlrpc 2026-05-19 17:59:33 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:19178 https://access.redhat.com/errata/RHSA-2026:19178

Comment 8 errata-xmlrpc 2026-06-22 19:44:59 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:28036 https://access.redhat.com/errata/RHSA-2026:28036