CVE-2025-48584 is a vulnerability identified in Google Android version 16 within the NotificationManagerService.java component. The issue stems from a design or implementation flaw that allows bypassing the per-package notification channel limits. Notification channels are used to categorize and manage notifications from apps, and limits are imposed to prevent resource overuse. However, this vulnerability enables an attacker to circumvent these limits, causing excessive resource consumption. This resource exhaustion can lead to a local denial of service (DoS) condition, where the affected device may become unresponsive or degrade in performance. Exploitation requires only low-level privileges (PR:L) and no user interaction (UI:N), meaning an attacker with limited access to the device can trigger the DoS without needing the user to perform any action. The vulnerability does not impact confidentiality or integrity, focusing solely on availability (A:H). The CVSS score of 5.5 reflects a medium severity level, considering the local attack vector and limited privileges required. No patches are currently linked, and no known exploits have been reported in the wild as of the publication date. The underlying weakness corresponds to CWE-400, which relates to uncontrolled resource consumption. This vulnerability highlights the importance of robust resource management in system services, especially those exposed to multiple apps. Android 16 devices are widely deployed globally, including across Europe, making this a relevant concern for European organizations relying on Android mobile devices for business operations.

For European organizations, this vulnerability poses a risk primarily to the availability of Android devices running version 16. A successful exploitation could cause devices to become unresponsive or degrade in performance, potentially disrupting business operations reliant on mobile communications, notifications, or app functionality. This is particularly impactful for sectors with high mobile device usage such as finance, healthcare, and critical infrastructure. While the vulnerability does not compromise data confidentiality or integrity, denial of service conditions can lead to operational downtime and reduced productivity. The local attack vector means that attackers need some level of access to the device, which could be achieved through malicious apps or insider threats. Given the widespread use of Android devices in Europe, especially in countries with high Android market share like Germany, France, Italy, Spain, and the UK, the potential for impact is significant. Organizations with Bring Your Own Device (BYOD) policies or those deploying Android 16 devices in critical roles should be particularly vigilant. The absence of known exploits in the wild reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits post-disclosure.

1. Monitor for and restrict installation of untrusted or unnecessary applications to reduce the risk of local exploitation. 2. Implement strict app permission controls, especially limiting apps’ ability to interact with notification services or system components. 3. Employ mobile device management (MDM) solutions to enforce security policies and monitor device health and resource usage. 4. Once patches or updates become available from Google, prioritize their deployment across all Android 16 devices in the organization. 5. Educate users about the risks of installing apps from unknown sources and encourage reporting of unusual device behavior. 6. Consider network segmentation and endpoint protection to limit the impact of compromised devices. 7. Regularly audit device logs for signs of resource exhaustion or abnormal notification channel activity. 8. Engage with vendors and security communities to stay informed about any emerging exploits or mitigation techniques related to this vulnerability.