CVE-2022-49252 is a vulnerability identified in the Linux kernel specifically within the ASoC (ALSA System on Chip) codec driver for the rx-macro component. The issue arises from improper handling of enum types when accessing arrays. On certain platforms such as aarch64, where the size of a long integer is 8 bytes but the enum size is only 4 bytes, the code incorrectly uses an integer value to index an array, leading to out-of-bounds access. This type of vulnerability can cause undefined behavior including memory corruption, which may lead to system instability, crashes, or potentially allow an attacker to execute arbitrary code or escalate privileges if exploited. The vulnerability is rooted in a mismatch between data type sizes and improper bounds checking in kernel code. It affects Linux kernel versions identified by the commit hash 4f692926f562ff48abfcca6b16f36ff8d57473b6. No known exploits are currently reported in the wild, and no CVSS score has been assigned yet. The vulnerability was published on February 26, 2025, and has been addressed by the Linux kernel maintainers, though no direct patch links are provided in the information. This vulnerability is significant because the Linux kernel is widely used across many devices and servers, especially on ARM64 architectures common in embedded systems, mobile devices, and increasingly in cloud infrastructure. The flaw could be triggered by malicious code running on the affected system or by crafted inputs to the kernel driver, potentially compromising system integrity and availability.

For European organizations, the impact of CVE-2022-49252 could be substantial, particularly for those relying on Linux-based infrastructure running on ARM64 platforms. This includes cloud service providers, telecommunications companies, embedded device manufacturers, and enterprises using ARM-based servers or IoT devices. Exploitation could lead to denial of service through kernel crashes or, in a worst-case scenario, privilege escalation allowing attackers to gain root access. This would compromise confidentiality, integrity, and availability of critical systems. Given the widespread use of Linux in European data centers and embedded systems, the vulnerability could affect a broad range of sectors including finance, healthcare, manufacturing, and government services. The lack of known exploits suggests that immediate risk is moderate, but the presence of a kernel-level memory corruption bug always warrants prompt attention due to the potential for rapid weaponization once details become public. The vulnerability also poses risks to supply chain security, as compromised embedded devices could be used as entry points for larger attacks.

European organizations should prioritize updating their Linux kernel to the latest patched versions that address CVE-2022-49252. Since the vulnerability is in the kernel codec driver, ensuring that all systems, especially those running on ARM64 architectures, are fully patched is critical. Organizations should audit their infrastructure to identify devices and servers running affected kernel versions. For embedded and IoT devices, coordinate with vendors to obtain firmware updates or mitigations. Employ kernel hardening techniques such as Kernel Address Space Layout Randomization (KASLR), and enable security modules like SELinux or AppArmor to limit the impact of potential exploits. Implement strict access controls to prevent untrusted users or processes from interacting with vulnerable kernel components. Monitor system logs and kernel crash reports for signs of exploitation attempts. Additionally, consider network segmentation to isolate critical systems and reduce attack surface. Since no known exploits exist yet, proactive patching and monitoring are the best defenses. Finally, maintain an incident response plan that includes kernel-level vulnerabilities to rapidly respond if exploitation attempts are detected.