A container privilege escalation flaw was found in certain OpenShift Update Service (OSUS) images. This issue stems from the /etc/passwd file being created with group-writable permissions during build time. In certain conditions, an attacker who can execute commands within an affected container, even as a non-root user, may be able to leverage their membership in the root group to modify the /etc/passwd file. This could allow the attacker to add a new user with any arbitrary UID, including UID 0, leading to full root privileges within the container.
History

Wed, 08 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 08 Apr 2026 14:15:00 +0000

Type Values Removed Values Added
Description A container privilege escalation flaw was found in certain OpenShift Update Service (OSUS) images. This issue stems from the /etc/passwd file being created with group-writable permissions during build time. In certain conditions, an attacker who can execute commands within an affected container, even as a non-root user, may be able to leverage their membership in the root group to modify the /etc/passwd file. This could allow the attacker to add a new user with any arbitrary UID, including UID 0, leading to full root privileges within the container.
Title Osus-operator: privilege escalation via excessive /etc/passwd permissions
First Time appeared Redhat
Redhat openshift Update Service
Weaknesses CWE-276
CPEs cpe:/a:redhat:openshift_update_service:5
Vendors & Products Redhat
Redhat openshift Update Service
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-04-08T14:42:32.600Z

Reserved: 2025-08-21T14:40:40.822Z

Link: CVE-2025-57854

cve-icon Vulnrichment

Updated: 2026-04-08T14:42:26.460Z

cve-icon NVD

Status : Received

Published: 2026-04-08T14:16:26.267

Modified: 2026-04-08T14:16:26.267

Link: CVE-2025-57854

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.