CVE-2024-50005 is a vulnerability identified in the Linux kernel's mac802154 subsystem, specifically within the function mac802154_scan_worker. The issue arises from improper use of Read-Copy-Update (RCU) synchronization primitives. In this function, the field scan_req->type was accessed after the RCU read-side critical section had been exited, violating RCU usage rules. This incorrect access can lead to undefined behavior such as use-after-free conditions or accessing stale or invalid memory, potentially causing kernel crashes or memory corruption. The vulnerability was discovered through static analysis focused on detecting RCU-related issues. The fix involves storing the scan_req->type value in a local variable while still inside the RCU critical section, ensuring safe access after the lock is released. This correction prevents illegal memory access and stabilizes kernel behavior during mac802154 scanning operations. The vulnerability affects specific Linux kernel commits identified by their hashes, indicating it is present in certain recent kernel versions. No known exploits have been reported in the wild at the time of publication, and no CVSS score has been assigned yet.

For European organizations, the impact of CVE-2024-50005 depends largely on their use of Linux systems that include the mac802154 subsystem, which supports IEEE 802.15.4 wireless communication protocols commonly used in low-rate wireless personal area networks (LR-WPANs). This subsystem is relevant for IoT devices, embedded systems, and industrial control systems that rely on such wireless standards. Exploitation could lead to kernel instability or denial of service through crashes or memory corruption, potentially disrupting critical services or embedded device operations. While direct remote exploitation is unlikely without local access or specific conditions, the vulnerability could be leveraged by an attacker with local privileges or through crafted wireless packets if the device processes such traffic. European industries with deployments of Linux-based IoT infrastructure, smart manufacturing, or critical infrastructure monitoring using 802.15.4 radios could face operational risks. Additionally, the vulnerability could be a stepping stone for privilege escalation or further kernel-level attacks if combined with other vulnerabilities. The absence of known exploits reduces immediate risk but does not eliminate the need for timely patching, especially in sectors with high availability and security requirements such as energy, transportation, and healthcare.

European organizations should prioritize updating Linux kernels to versions where this vulnerability is patched. Since the fix involves a code-level correction in the mac802154 subsystem, applying official Linux kernel updates or vendor-provided patches is the most effective mitigation. For embedded or IoT devices that may not receive frequent kernel updates, organizations should work with device manufacturers to obtain patched firmware or consider network segmentation to isolate vulnerable devices. Monitoring kernel logs for unusual crashes or memory errors related to mac802154 operations can help detect exploitation attempts. Additionally, limiting local user access and enforcing strict privilege separation reduces the risk of local exploitation. For environments using 802.15.4 wireless communications, implementing network-level protections such as filtering or anomaly detection on wireless traffic may help mitigate attack vectors that rely on crafted packets. Finally, incorporating this vulnerability into vulnerability management and patching workflows ensures timely remediation and reduces exposure.