CVE-2025-58342 is a vulnerability identified in the Wi-Fi driver component of multiple Samsung Exynos processors used in mobile and wearable devices. The flaw stems from an unbounded memory allocation triggered by writing a large buffer to the /proc/driver/unifi0/uapsd interface. This operation leads to kernel memory exhaustion, effectively causing a denial of service (DoS) condition by exhausting critical system resources. The vulnerability is classified under CWE-770 (Allocation of Resources Without Limits or Throttling), indicating improper handling of resource allocation. Exploitation requires local access to the device, but no privileges or user interaction are necessary, making it potentially exploitable by any local process or user. The affected processors include a broad range of Samsung Exynos models: 980, 850, 1080, 1280, 1330, 1380, 1480, 1580, and wearable processors W920, W930, and W1000, which are embedded in various Samsung smartphones and wearable devices. The CVSS v3.1 base score is 6.2 (medium), reflecting the vulnerability’s impact on availability without affecting confidentiality or integrity. No known exploits have been reported in the wild, and no official patches have been released at the time of publication. The vulnerability could be leveraged by attackers to disrupt device functionality, potentially impacting user productivity and device reliability. Given the widespread use of Samsung devices globally, this vulnerability poses a tangible risk, especially in environments where device availability is critical.

For European organizations, the primary impact of CVE-2025-58342 is the potential for denial of service on devices running affected Samsung Exynos processors. This could disrupt mobile communications, wearable device functionality, and any business processes reliant on these devices. Enterprises with mobile workforces using Samsung smartphones or wearables may experience reduced productivity or operational interruptions if devices become unresponsive due to kernel memory exhaustion. While the vulnerability does not compromise data confidentiality or integrity, the availability impact can affect critical communications, especially in sectors like finance, healthcare, and emergency services. Additionally, the inability to patch immediately may prolong exposure. The risk is heightened in organizations with Bring Your Own Device (BYOD) policies where device security controls are limited. Furthermore, the local access requirement limits remote exploitation but insider threats or malicious apps could exploit this vulnerability. Overall, the threat could lead to increased support costs, user dissatisfaction, and potential operational delays.

To mitigate CVE-2025-58342, organizations should first restrict access to the /proc/driver/unifi0/uapsd interface to trusted users and processes only, minimizing the risk of unprivileged exploitation. Implement strict application whitelisting and endpoint protection to prevent unauthorized local code execution that could trigger the vulnerability. Monitor device logs and system metrics for unusual memory allocation patterns or kernel resource exhaustion indicative of exploitation attempts. Encourage users to avoid installing untrusted applications that might exploit local vulnerabilities. Coordinate with Samsung and device vendors to obtain and deploy firmware or driver updates as soon as patches become available. In the interim, consider disabling or limiting Wi-Fi driver features related to the vulnerable interface if feasible. For enterprise environments, enforce mobile device management (MDM) policies that can control device configurations and restrict access to sensitive system interfaces. Conduct regular security awareness training to inform users about the risks of local exploitation and the importance of device hygiene. Finally, maintain an inventory of devices with affected processors to prioritize patching and monitoring efforts.