CVE-2025-57854
Osus-operator: privilege escalation via excessive /etc/passwd permissions
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-276 |
| Vendor | red hat |
| Product | red hat openshift update service |
| Published | Apr 8, 2026 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Red Hat / Red Hat OpenShift Update Service
All versions affected References
Credits
Red Hat would like to thank Antony Di Scala and Michael Whale for reporting this issue.