CVE-2025-6019

Publication date 17 June 2025

Last updated 25 June 2025

Ubuntu priority

High

Why this priority?

Cvss 3 Severity Score

7.0 · High

Score breakdown

Description

A Local Privilege Escalation (LPE) vulnerability was found in libblockdev. Generally, the "allow_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 "allow_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.

Read the notes from the security team

Why is this CVE high priority?

Allows local privilege escalation

Learn more about Ubuntu priority

Status

Package Ubuntu Release Status
libblockdev 25.10 questing
Not affected
25.04 plucky
Fixed 3.3.0-2ubuntu0.1
24.10 oracular
Fixed 3.1.1-2ubuntu0.1
24.04 LTS noble
Fixed 3.1.1-1ubuntu0.1
22.04 LTS jammy
Fixed 2.26-1ubuntu0.1
20.04 LTS focal
Fixed 2.23-2ubuntu3+esm1
18.04 LTS bionic
Fixed 2.16-2ubuntu0.1~esm1
udisks2 25.10 questing
Fixed 2.10.1-12.1ubuntu1
25.04 plucky
Fixed 2.10.1-11ubuntu2.2
24.10 oracular
Fixed 2.10.1-9ubuntu3.2
24.04 LTS noble
Fixed 2.10.1-6ubuntu1.2
22.04 LTS jammy
Fixed 2.9.4-1ubuntu2.2
20.04 LTS focal
Fixed 2.8.4-1ubuntu2+esm1
18.04 LTS bionic
Fixed 2.7.6-3ubuntu0.2+esm1
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Needs evaluation

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Notes

mdeslaur

The actual CVE is in libblockdev, the udisks2 fix is considered to be a hardening measure as a precaution.

Severity score breakdown

Parameter Value
Base score 7.0 · High
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

Other references