CVE-2025-5962 identifies an improper access control vulnerability within the Lightspeed history service component of Red Hat Enterprise Linux 10. The flaw arises because the service inadequately restricts access to chat history data, allowing any local, unprivileged user on the same system to leverage inter-process communication (IPC) mechanisms to interact with the history service. Through this IPC abuse, an attacker can read another user's chat history, delete entries, or inject arbitrary commands into the history log. This manipulation can be exploited to deceive users by presenting misleading or malicious command histories, potentially tricking them into executing harmful commands. The vulnerability does not require elevated privileges or user interaction, increasing its risk profile. The CVSS 3.1 score of 7.7 reflects high severity, primarily due to the high impact on confidentiality and integrity, though availability is unaffected. The scope is local system users, and no known exploits have been reported in the wild as of the publication date. The vulnerability's root cause is insufficient access control enforcement on IPC calls to the Lightspeed history service, a critical oversight in the design of inter-user data isolation on multi-user systems running RHEL 10.

For European organizations, this vulnerability threatens the confidentiality and integrity of user command histories on Red Hat Enterprise Linux 10 systems. Attackers with local access can manipulate command histories to mislead users into executing malicious commands, potentially leading to privilege escalation or unauthorized actions. This can compromise sensitive data, disrupt operations, or facilitate further attacks within the network. Organizations relying on multi-user RHEL 10 environments, such as shared servers or developer workstations, are particularly vulnerable. The risk extends to sectors with high security requirements, including finance, government, and critical infrastructure, where social engineering attacks leveraging this flaw could have severe consequences. Although no remote exploitation is possible, insider threats or attackers who gain initial local access can exploit this vulnerability to deepen their foothold. The absence of known exploits in the wild provides a window for proactive mitigation before widespread exploitation occurs.

To mitigate CVE-2025-5962, organizations should prioritize applying official patches from Red Hat once released. Until patches are available, restrict local user access to systems running RHEL 10 by enforcing strict user account management and limiting the number of users with local login privileges. Implement mandatory access controls (e.g., SELinux policies) to constrain IPC interactions with the Lightspeed history service, ensuring only authorized processes and users can communicate with it. Monitor IPC traffic and system logs for unusual access patterns or attempts to manipulate history entries. Educate users about the risks of executing commands based solely on history entries and encourage verification of commands before execution. Additionally, consider isolating sensitive user environments or employing containerization to reduce the impact of local privilege abuse. Regularly audit system configurations and user permissions to detect and remediate potential exploitation paths.