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.
History

Fri, 29 Aug 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Thu, 28 Aug 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 28 Aug 2025 15:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Udisks: out-of-bounds read in udisks daemon
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-125
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 8.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2025-08-28T14:47:08.578Z

Updated: 2025-08-28T16:20:55.402Z

Reserved: 2025-07-22T22:54:45.533Z

Link: CVE-2025-8067

cve-icon Vulnrichment

Updated: 2025-08-28T16:20:52.433Z

cve-icon NVD

Status : Received

Published: 2025-08-28T15:16:03.600

Modified: 2025-08-28T15:16:03.600

Link: CVE-2025-8067

cve-icon Redhat

Severity : Important

Publid Date: 2025-08-28T14:42:00Z

Links: CVE-2025-8067 - Bugzilla