CVE-2025-57848 – Container-native-virtualization: privilege escalation via excessive /etc/passwd permissions

CVE ID : CVE-2025-57848

Published : Oct. 23, 2025, 8:15 p.m. | 27 minutes ago

Description : A container privilege escalation flaw was found in certain Container-native Virtualization 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, can 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.

Severity: 5.2 | MEDIUM

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