CVE-2022-49023 is a vulnerability identified in the Linux kernel's wireless networking subsystem, specifically within the cfg80211 component responsible for Wi-Fi configuration and management. The issue arises from a buffer overflow in the element comparison logic for vendor-specific elements. The vulnerable code assumes the presence of 5 octets (bytes) in the vendor element without properly verifying this length, leading to a potential buffer overflow condition. Although the element itself is checked to fit within expected bounds, the specific length check for these 5 octets was missing, which could allow an attacker to craft malicious Wi-Fi management frames that exploit this unchecked assumption. Such a buffer overflow could lead to memory corruption, potentially allowing an attacker to execute arbitrary code within the kernel context or cause a denial of service by crashing the kernel. The vulnerability affects Linux kernel versions prior to the patch that corrects this length verification. No known exploits are currently reported in the wild, and no CVSS score has been assigned yet. The vulnerability was published on October 21, 2024, and is considered a security risk due to its potential impact on the core operating system kernel.

For European organizations, this vulnerability poses a significant risk, especially for those relying on Linux-based systems for critical infrastructure, servers, and network devices. Exploitation could lead to unauthorized kernel-level code execution, compromising system confidentiality, integrity, and availability. This is particularly concerning for sectors such as telecommunications, finance, government, and energy, where Linux is widely deployed. The ability to exploit this vulnerability remotely via crafted Wi-Fi frames could allow attackers to bypass network perimeter defenses, potentially leading to lateral movement within corporate networks. Additionally, disruption of wireless services through denial of service could impact operational continuity. Given the widespread use of Linux in embedded devices and IoT within Europe, the attack surface is broad, increasing the likelihood of targeted attacks against critical systems.

Organizations should prioritize patching Linux kernel versions to the latest releases that include the fix for CVE-2022-49023. Since the vulnerability is in the wireless subsystem, disabling or restricting Wi-Fi interfaces on critical systems where wireless connectivity is not required can reduce exposure. Network segmentation should be enforced to isolate wireless networks from sensitive infrastructure. Monitoring for unusual Wi-Fi management frames and implementing intrusion detection systems capable of analyzing wireless traffic can help detect exploitation attempts. Vendors and system integrators should verify that embedded Linux devices are updated promptly. Additionally, organizations should review and harden kernel configurations to minimize the attack surface, including disabling unnecessary wireless features. Incident response plans should include scenarios involving kernel-level compromises via wireless vectors.