CVE-2025-57849

6.4 MEDIUM

A container privilege escalation flaw was found in certain Fuse images

Published: 2026-03-13 · Last updated: 2026-06-05

Severity and scoring

CVSS: 6.4 MEDIUM
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-276

Affected products

Vendor	Product
redhat	fuse

Description

A container privilege escalation flaw was found in certain Fuse 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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2025-57849
[Vendor advisory]https://access.redhat.com/security/cve/CVE-2025-57849
[Vendor advisory]https://bugzilla.redhat.com/show_bug.cgi?id=2391100

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