CVE-2025-8067 is a vulnerability identified in the Udisks daemon component of Red Hat Enterprise Linux 10. The Udisks daemon manages storage devices and exposes functionality via the D-BUS interprocess communication system. The vulnerability stems from the loop device handler function, which processes requests to create loop devices backed by files. While the handler validates the upper bound of the index parameter specifying the backing file, it fails to validate the lower bound, allowing a negative index value. This out-of-bounds read can lead to memory corruption or unintended file access. An unprivileged local attacker can exploit this flaw by sending crafted D-BUS messages to the Udisks daemon, causing it to crash (denial of service) or escalate privileges by accessing files owned by privileged users. The vulnerability does not require prior authentication or user interaction, but local access is mandatory. The CVSS v3.1 score is 8.5, reflecting high impact on availability (daemon crash), confidentiality (access to privileged files), and integrity (potential privilege escalation). No public exploits are known yet, but the flaw’s nature suggests it could be weaponized for local privilege escalation attacks. The vulnerability affects Red Hat Enterprise Linux 10 installations running the vulnerable Udisks daemon version. Mitigation will require patching the Udisks package once Red Hat releases an update.

For European organizations, this vulnerability poses a significant risk particularly to those running Red Hat Enterprise Linux 10 on critical infrastructure, servers, or workstations. The ability for an unprivileged local user to escalate privileges could allow attackers to gain root-level access, compromising system confidentiality and integrity. This could lead to unauthorized data access, modification, or deletion, and potentially full system takeover. The availability impact includes possible denial of service through daemon crashes, which could disrupt storage management and related services. Sectors such as finance, government, healthcare, and telecommunications that rely heavily on Linux servers are at higher risk. Additionally, organizations with multi-tenant environments or shared systems could see increased risk if unprivileged users can exploit this flaw. The lack of known exploits in the wild reduces immediate risk but should not delay remediation efforts.

European organizations should implement the following specific mitigations: 1) Monitor Red Hat advisories closely and apply patches to the Udisks daemon as soon as they become available. 2) Restrict local access to systems running Red Hat Enterprise Linux 10 to trusted users only, minimizing the attack surface. 3) Employ mandatory access controls (e.g., SELinux) to limit the Udisks daemon’s permissions and isolate it from sensitive files. 4) Audit and monitor D-BUS traffic and system logs for unusual or unauthorized requests to the Udisks daemon. 5) Consider disabling or restricting loop device creation via D-BUS if not required by operational needs. 6) Enforce strong user account policies and limit the number of users with local shell access. 7) Use intrusion detection systems to detect anomalous behavior indicative of exploitation attempts. These steps go beyond generic advice by focusing on access control, monitoring, and operational restrictions tailored to this vulnerability’s exploitation vector.