CVE-2025-57851
A container privilege escalation flaw was found in certain Multicluster Engine for Kubernetes images.
Published Apr 8, 2026 · updated Jul 24, 2026 · redhat advanced cluster management for kubernetes
A container privilege escalation flaw was found in certain Multicluster Engine for Kubernetes 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.
Code
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No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Apr 8, 2026 · NIST NVD
Detected
A container privilege escalation flaw was found in certain Multicluster Engine for Kubernetes 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 f
Jul 24, 2026 · NIST NVD
Updated
A container privilege escalation flaw was found in certain Multicluster Engine for Kubernetes 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 f
Affected
- cpe redhat/advanced cluster management for kubernetesversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2025-57851
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2025-57851
A container privilege escalation flaw was found in certain Multicluster Engine for Kubernetes 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
nvd.nist.gov