CVE-2025-3931: 
Linux Red Hat vulnerability analysis and mitigation

CVE-2025-3931 is a security vulnerability discovered in Yggdrasil, a system broker component that enables process communication through DBus. The vulnerability was disclosed on May 14, 2025, affecting Red Hat Enterprise Linux 10. The flaw exists in the DBus dispatch message functionality, which lacks proper authentication and authorization checks, allowing any system user to call the dispatch method (NVD, Wiz Report).

The vulnerability stems from Yggdrasil's implementation of the DBus method for dispatching messages to workers. The system broker creates a DBus method to dispatch messages but fails to implement proper authentication and authorization checks. This security flaw has been assigned a CVSS v3.1 base score of 7.8 (HIGH) with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating local access with low complexity and high impacts on confidentiality, integrity, and availability (NVD).

The vulnerability enables local privilege escalation by allowing attackers with system access to leverage the lack of authentication on the dispatch message functionality. Through this flaw, attackers can force the Yggdrasil worker to install arbitrary RPM packages, potentially leading to access and modification of sensitive system data (Red Hat Advisory).

Red Hat has released security updates to address this vulnerability through RHSA-2025:7592. The fix is available for Red Hat Enterprise Linux 10 and its variants. System administrators should apply the provided security update package yggdrasil-0.4.5-3.el10_0 to mitigate this vulnerability (Red Hat Advisory).