CVE-2025-8067

Publication date 28 August 2025

Last updated 12 September 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

8.5 · High

Score breakdown

A flaw was found in the Udisks daemon, where it allows unprivileged users to create loop devices using the D-BUS system. This is achieved via the loop device handler, which handles requests sent through the D-BUS interface. As two of the parameters of this handle, it receives the file descriptor list and index specifying the file where the loop device should be backed. The function itself validates the index value to ensure it isn't bigger than the maximum value allowed. However, it fails to validate the lower bound, allowing the index parameter to be a negative value. Under these circumstances, an attacker can cause the UDisks daemon to crash or perform a local privilege escalation by gaining access to files owned by privileged users.

Status

Package Ubuntu Release Status
udisks2 25.04 plucky
Fixed 2.10.1-11ubuntu2.3
24.04 LTS noble
Fixed 2.10.1-6ubuntu1.3
22.04 LTS jammy
Fixed 2.9.4-1ubuntu2.3
20.04 LTS focal
Fixed 2.8.4-1ubuntu2+esm2
18.04 LTS bionic
Fixed 2.7.6-3ubuntu0.2+esm2
16.04 LTS xenial
Fixed 2.1.7-1ubuntu1+esm1
14.04 LTS trusty
Fixed 2.1.3-1ubuntu0.1+esm1

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Severity score breakdown

Parameter Value
Base score 8.5 · High
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Scope Changed
Confidentiality Low
Integrity impact Low
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H

References

Related Ubuntu Security Notices (USN)

Other references