CVE-2025-58345 is a security vulnerability identified in the Wi-Fi driver component of several Samsung Exynos processors, including models 980, 850, 1080, 1280, 2200, 1330, 1380, 1480, 1580, and wearable processors W920, W930, and W1000. The vulnerability arises from an unbounded memory allocation triggered by writing a large buffer to the /proc/driver/unifi0/ap_certif_11ax_mode procfs interface. This interface is used for configuring or interacting with the Wi-Fi driver, specifically related to 802.11ax (Wi-Fi 6) certification modes. Because the driver does not properly limit the size of the buffer, an attacker with local access can cause the kernel to allocate excessive memory, leading to kernel memory exhaustion. This can result in a denial of service (DoS) condition by crashing the kernel or causing severe system instability. The flaw does not require authentication but does require local access to the device, meaning an attacker must have some level of control or access to the device's operating system environment. There are no known public exploits or active exploitation campaigns reported at this time. The vulnerability affects a wide range of Samsung Exynos processors embedded in many Samsung smartphones and wearable devices, which are popular in the European market. The lack of a CVSS score indicates that the vulnerability is newly disclosed and not yet fully assessed. However, the nature of the flaw—kernel memory exhaustion via unbounded allocation—suggests a significant impact on availability. Patching by Samsung is necessary to fully remediate the issue, but until patches are available, mitigating controls such as restricting access to the procfs interface and monitoring device stability are advisable.

The primary impact of CVE-2025-58345 is denial of service through kernel memory exhaustion, which can cause affected devices to crash or become unresponsive. For European organizations, this could disrupt mobile workforce productivity, especially for those relying heavily on Samsung mobile devices and wearables for communication and operational tasks. Critical sectors such as finance, healthcare, and government agencies that use Samsung devices could experience interruptions in service or loss of device availability. Additionally, if exploited in targeted attacks, this vulnerability could be used as a vector to degrade security monitoring or incident response capabilities by disabling devices. The requirement for local access limits remote exploitation but does not eliminate risk, as malware or malicious insiders could trigger the vulnerability. The widespread use of Samsung Exynos processors in Europe increases the potential attack surface. The absence of known exploits currently reduces immediate risk but does not preclude future exploitation. Overall, the vulnerability poses a high risk to device availability and operational continuity in European environments with significant Samsung device deployment.

1. Monitor Samsung's official security advisories and apply firmware or driver updates promptly once patches for CVE-2025-58345 are released. 2. Until patches are available, restrict access to the /proc/driver/unifi0/ap_certif_11ax_mode interface by enforcing strict permissions or disabling access where feasible to prevent untrusted users or applications from writing to this procfs entry. 3. Implement endpoint security solutions that can detect anomalous behavior or excessive memory usage indicative of exploitation attempts. 4. Educate users about the risks of installing untrusted applications or granting unnecessary permissions that could enable local attackers to exploit this vulnerability. 5. For enterprise-managed devices, enforce mobile device management (MDM) policies that limit local access and control application installation. 6. Conduct regular device health monitoring to detect crashes or instability potentially caused by this vulnerability. 7. Collaborate with Samsung support channels to obtain early access to patches or workarounds if available. 8. Consider network segmentation and limiting device exposure to reduce the risk of lateral movement if a device is compromised.