CVE-2022-48844 is a vulnerability identified in the Linux kernel's Bluetooth subsystem, specifically within the hci_core component. The issue arises from improper memory management where the 'sent_cmd' socket buffer (skb) is not freed before the associated hci_dev device structure is freed. This results in a memory leak of the contents held in the sent_cmd skb. The vulnerability is rooted in the kernel's handling of Bluetooth Host Controller Interface (HCI) commands, where the lifecycle of command buffers is not correctly managed, leading to residual memory consumption. Although the vulnerability does not directly allow code execution or privilege escalation, the memory leak could degrade system performance over time, potentially leading to denial of service (DoS) conditions if exploited repeatedly or on systems with constrained resources. The affected versions are identified by specific commit hashes, indicating that this is a recent and targeted fix. No known exploits are currently reported in the wild, and no CVSS score has been assigned yet. The vulnerability was published on July 16, 2024, and has been enriched by CISA, indicating recognition by cybersecurity authorities.

For European organizations, the impact of CVE-2022-48844 primarily revolves around system stability and availability. Enterprises relying heavily on Linux-based systems with Bluetooth capabilities—such as those in manufacturing, healthcare, telecommunications, and IoT deployments—may experience gradual degradation of system performance due to memory leaks. This can lead to increased maintenance costs, unexpected system reboots, or service interruptions. While the vulnerability does not directly compromise confidentiality or integrity, the potential for denial of service through resource exhaustion could disrupt critical operations. Organizations with large-scale deployments of Linux servers or embedded devices using Bluetooth interfaces are particularly at risk. Additionally, sectors with stringent uptime requirements, such as financial services and public infrastructure, could face operational challenges if this vulnerability is exploited or left unpatched.

To mitigate CVE-2022-48844, organizations should promptly apply the official Linux kernel patches that address the memory leak in the Bluetooth hci_core component. Since the vulnerability involves kernel-level code, updating to the latest stable kernel version that includes the fix is essential. For environments where immediate patching is not feasible, consider disabling Bluetooth functionality on critical systems if it is not required, thereby eliminating the attack surface. Monitoring system memory usage and kernel logs for unusual patterns related to Bluetooth operations can help detect potential exploitation attempts. Additionally, organizations should implement strict access controls to limit user and process permissions related to Bluetooth device management, reducing the risk of triggering the vulnerability. Regularly auditing and updating Linux distributions and kernel versions as part of a robust patch management process will further reduce exposure.