CVE-2024-41046 is a vulnerability identified in the Linux kernel, specifically within the ethernet driver for Lantiq etop devices. The flaw arises from improper memory management in the network driver code, where the count of released descriptors is not incremented correctly. This leads to a double free condition, meaning the same socket buffer (skb) is freed multiple times. Double free vulnerabilities can cause undefined behavior including kernel crashes (denial of service), memory corruption, or potentially arbitrary code execution if exploited carefully. The vulnerability affects certain versions of the Linux kernel as indicated by the commit hashes, though exact kernel version numbers are not specified. The issue was resolved by correcting the descriptor release logic to ensure the skb is freed exactly once. No known exploits are currently reported in the wild, and no CVSS score has been assigned yet. However, the vulnerability impacts the kernel's network stack, which is a critical component for system stability and security. Since the flaw is in a network driver, exploitation could be triggered remotely if the vulnerable driver is exposed to untrusted network traffic, but this depends on the deployment context of the affected hardware and kernel versions.

For European organizations, this vulnerability poses a risk primarily to systems running Linux kernels with the affected Lantiq etop ethernet driver, which is commonly found in embedded devices such as routers, network appliances, or industrial equipment. Exploitation could lead to denial of service through kernel crashes, disrupting network connectivity and critical services. In worst cases, memory corruption might allow privilege escalation or remote code execution, threatening confidentiality, integrity, and availability of systems. Organizations relying on Linux-based network infrastructure or embedded devices in sectors like telecommunications, manufacturing, or critical infrastructure could face operational disruptions. The impact is heightened in environments where patching embedded devices is challenging or where network segmentation is insufficient to isolate vulnerable devices. Given the kernel-level nature of the flaw, successful exploitation could compromise entire systems, affecting data security and service continuity.

Organizations should promptly identify devices running Linux kernels with the vulnerable Lantiq etop ethernet driver. Applying the official Linux kernel patches that fix the double free issue is the primary mitigation step. For embedded devices or appliances where kernel updates are not straightforward, vendors should be contacted for firmware updates addressing this vulnerability. Network segmentation should be employed to isolate vulnerable devices from untrusted networks, reducing exposure. Monitoring network traffic for anomalies and implementing intrusion detection systems can help detect exploitation attempts. Additionally, organizations should review their patch management processes for embedded and network devices to ensure timely updates. Where possible, disabling or replacing vulnerable hardware or drivers with alternatives can reduce risk. Finally, maintaining backups and incident response plans will help mitigate impact if exploitation occurs.