CVE-2025-6019 Information

Description

A Local Privilege Escalation (LPE) vulnerability was found in libblockdev. Generally the llow_active\ setting in Polkit permits a physically present user to take certain actions based on the session type. Due to the way libblockdev interacts with the udisks daemon an llow_active\ user on a system may be able escalate to full root privileges on the target host. Normally udisks mounts user-provided filesystem images with security flags like nosuid and nodev to prevent privilege escalation. However a local attacker can create a specially crafted XFS image containing a SUID-root shell then trick udisks into resizing it. This mounts their malicious filesystem with root privileges allowing them to execute their SUID-root shell and gain complete control of the system.

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

http://www.openwall.com/lists/oss-security/2025/06/17/5 http://www.openwall.com/lists/oss-security/2025/06/17/6 http://www.openwall.com/lists/oss-security/2025/06/18/1 https://access.redhat.com/security/cve/CVE-2025-6019 https://bugzilla.redhat.com/show_bug.cgi?id=2370051 https://lists.debian.org/debian-lts-announce/2025/06/msg00018.html

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.0

Related CNNVD

CNNVD-202506-2580 (Published: 2025-06-19)