CVE-2025-24311 is a high-severity out-of-bounds read vulnerability (CWE-125) affecting the Broadcom BCM5820X component, specifically within the Dell ControlVault3 and ControlVault3 Plus products. The vulnerability resides in the cv_send_blockdata functionality, where a specially crafted API call to the ControlVault interface can trigger an out-of-bounds read condition. This flaw allows an attacker with limited privileges (local access with low privileges) to cause an information leak by reading memory outside the intended buffer boundaries. The vulnerability does not require user interaction but does require local access and some level of privilege, as indicated by the CVSS vector (AV:L/AC:L/PR:L/UI:N). The scope is changed (S:C), meaning the vulnerability can affect resources beyond the initially vulnerable component, potentially impacting confidentiality (C:H) and availability (A:H), but not integrity (I:N). The vulnerability is present in versions prior to Dell ControlVault3 5.15.10.14 and ControlVault3 Plus 6.2.26.36. No known exploits are currently in the wild, and no patches have been linked yet. The Dell ControlVault3 is a security subsystem embedded in Dell devices, often used for cryptographic operations and secure key storage, leveraging the Broadcom BCM5820X chip. An attacker exploiting this vulnerability could leak sensitive information from the secure enclave or memory regions, potentially exposing cryptographic keys or other confidential data, and could also cause denial of service conditions due to the out-of-bounds read impacting availability. The vulnerability's exploitation requires local access, which limits remote exploitation but remains critical in environments where attackers can gain local foothold or where multi-user systems are deployed. Given the strategic role of ControlVault in device security, this vulnerability poses a significant risk to the confidentiality and availability of protected data on affected Dell hardware.

For European organizations, this vulnerability could have severe consequences, especially in sectors relying heavily on Dell hardware with embedded ControlVault3 security modules, such as finance, government, healthcare, and critical infrastructure. The potential leakage of sensitive cryptographic material or secure credentials could lead to unauthorized access to protected systems, data breaches, and compromise of secure communications. The availability impact could disrupt business operations if the vulnerability is triggered to cause denial of service. Since the vulnerability requires local access with low privileges, insider threats or attackers who have already compromised user accounts could escalate their capabilities. This risk is heightened in shared or multi-user environments common in enterprise and public sector deployments. Additionally, the confidentiality breach could undermine compliance with European data protection regulations such as GDPR, leading to legal and financial repercussions. The lack of currently available patches increases the window of exposure, necessitating immediate risk mitigation. Organizations with remote or hybrid workforces may face challenges in controlling local access, increasing the attack surface. Overall, the vulnerability threatens the security posture of European organizations relying on affected Dell devices for secure operations.

1. Immediate inventory and identification of all Dell devices utilizing ControlVault3 or ControlVault3 Plus with Broadcom BCM5820X chips should be conducted to assess exposure. 2. Restrict local access to affected devices by enforcing strict access controls, including disabling or limiting local accounts that are not essential, and applying the principle of least privilege. 3. Implement endpoint detection and response (EDR) solutions to monitor for unusual API calls or attempts to interact with the ControlVault interface, focusing on anomalous local activity. 4. Until patches are available, consider deploying application whitelisting and restricting execution of untrusted code or scripts that could trigger the vulnerability. 5. Enhance physical security controls to prevent unauthorized physical access to devices, especially in sensitive environments. 6. Coordinate with Dell and Broadcom for timely receipt and deployment of official patches or firmware updates once released. 7. Conduct user awareness training to reduce insider threat risks and encourage reporting of suspicious device behavior. 8. For critical systems, consider network segmentation to isolate affected devices and limit lateral movement in case of compromise. 9. Regularly review and update device firmware and security configurations to minimize exposure to similar vulnerabilities. 10. Employ cryptographic key rotation policies to mitigate potential key exposure from information leaks.