CVE-2025-24311 identifies a critical out-of-bounds read vulnerability (CWE-125) in the Broadcom BCM5820X chipset, specifically within the Dell ControlVault3 and ControlVault3 Plus firmware prior to versions 5.15.10.14 and 6.2.26.36 respectively. The vulnerability resides in the cv_send_blockdata function, which processes ControlVault API calls. An attacker with low-level privileges on the host system can craft a malicious API call that causes the function to read memory outside the intended buffer boundaries. This out-of-bounds read leads to an information leak, exposing sensitive data from memory that should not be accessible. The vulnerability requires local access and privileges but does not require user interaction, making it a potent threat in environments where attackers can gain limited access. The vulnerability impacts confidentiality by leaking sensitive information and affects availability due to potential system instability from memory access violations. The CVSS v3.1 base score is 8.4, reflecting high severity with attack vector local, low attack complexity, low privileges required, no user interaction, and scope change. No public exploits have been reported yet, but the vulnerability's characteristics suggest it could be leveraged for privilege escalation or further attacks. The Broadcom BCM5820X chipset is embedded in Dell ControlVault3 security modules, which are used in Dell enterprise laptops and desktops to provide secure authentication and cryptographic functions. Therefore, systems using these modules are vulnerable until patched. The vulnerability was published on June 13, 2025, and was reserved in February 2025. No patch links are currently available, indicating that mitigation relies on vendor firmware updates and access control measures.

For European organizations, the impact of CVE-2025-24311 is significant, particularly in sectors relying on Dell enterprise hardware with Broadcom ControlVault3 modules, such as finance, government, healthcare, and critical infrastructure. The vulnerability allows attackers with local access to leak sensitive information from protected memory areas, potentially exposing cryptographic keys, authentication tokens, or other confidential data. This compromises confidentiality and may facilitate further attacks like privilege escalation or lateral movement within networks. The vulnerability also affects system availability due to possible crashes or instability caused by out-of-bounds memory reads. Organizations with remote or shared workstation environments are at increased risk if attackers can gain local access through other means. The lack of user interaction requirement and low privilege needed for exploitation increase the threat level. Given the high CVSS score and the critical role of ControlVault in device security, failure to address this vulnerability could lead to severe data breaches and operational disruptions in European enterprises.

To mitigate CVE-2025-24311, European organizations should prioritize the following actions: 1) Monitor Dell's official security advisories and promptly apply firmware updates for ControlVault3 and ControlVault3 Plus modules once available. 2) Restrict local access to systems with affected Broadcom BCM5820X chipsets by enforcing strict physical security controls and limiting administrative privileges. 3) Implement endpoint security solutions that monitor and control API calls to ControlVault modules, detecting anomalous or unauthorized usage. 4) Employ network segmentation and access controls to reduce the risk of attackers gaining local access to vulnerable devices. 5) Conduct regular security audits and vulnerability assessments focusing on hardware security modules and firmware versions. 6) Educate IT staff about the risks associated with local privilege exploitation and the importance of timely patch management. 7) Consider deploying host-based intrusion detection systems (HIDS) to identify suspicious activity related to ControlVault API usage. These measures, combined with vendor patches, will reduce the risk of exploitation and limit potential damage.