CVE-2026-24813 is a NULL Pointer Dereference vulnerability identified in the abcz316 SKRoot-linuxKernelRoot product, affecting the testRoot/jni/utils modules, particularly involving the cJSON.Cpp program files. This vulnerability arises when the software improperly handles null pointers, leading to a crash or denial of service (DoS) condition when the affected code attempts to dereference a null pointer. The vulnerability is exploitable remotely over the network without requiring any authentication or user interaction, making it particularly dangerous for exposed systems. The CVSS 4.0 base score is 8.7, indicating a high severity level primarily due to the ease of exploitation (network vector, no privileges required) and the significant impact on system availability. The vulnerability does not affect confidentiality or integrity directly but can cause service outages, which may disrupt operations relying on SKRoot-linuxKernelRoot. No patches or known exploits have been reported yet, but the presence of this flaw in kernel-rooted Linux modules suggests potential impact on embedded or specialized Linux environments. The vulnerability is classified under CWE-476 (NULL Pointer Dereference), a common programming error that can be mitigated by proper null checks and error handling in the source code. Given the involvement of cJSON.Cpp, a JSON parsing library, malformed or unexpected JSON inputs might trigger the fault. The lack of affected versions listed suggests the vulnerability may impact multiple or all current versions of the product. The vulnerability was published on January 27, 2026, by GovTech CSG, indicating a government or public sector origin of the report.

The primary impact of CVE-2026-24813 is on the availability of systems running the SKRoot-linuxKernelRoot product, as exploitation leads to a denial of service via system crashes. For European organizations, especially those operating critical infrastructure, industrial control systems, or telecommunications equipment that rely on embedded Linux platforms incorporating SKRoot-linuxKernelRoot, this could result in operational disruptions, service outages, and potential safety risks. The vulnerability does not compromise data confidentiality or integrity directly but may indirectly affect business continuity and service reliability. Organizations with network-exposed instances of this software are at higher risk since the vulnerability can be exploited remotely without authentication. The absence of known exploits in the wild currently provides a window for proactive mitigation, but the high CVSS score and ease of exploitation necessitate urgent attention. Disruptions could affect sectors such as manufacturing, energy, transportation, and public services, which are critical in the European context. Additionally, the potential for cascading failures in interconnected systems increases the risk profile for large enterprises and government entities.

To mitigate CVE-2026-24813, organizations should first identify all instances of SKRoot-linuxKernelRoot within their environments, focusing on embedded Linux systems and network-exposed devices. Since no official patches are currently available, immediate mitigation involves implementing network-level protections such as firewall rules to restrict access to vulnerable services and employing intrusion detection systems to monitor for anomalous traffic patterns targeting the affected modules. Developers and vendors should conduct thorough code audits of the testRoot/jni/utils modules, particularly the cJSON.Cpp components, to add robust null pointer checks and improve error handling to prevent dereferencing null pointers. Where possible, isolate or sandbox affected components to limit the impact of crashes. Organizations should also engage with the vendor or community for timely patch releases and apply updates promptly once available. Additionally, implementing redundancy and failover mechanisms can reduce the operational impact of potential service disruptions. Security teams should update incident response plans to include scenarios involving denial of service from this vulnerability and conduct awareness training for relevant personnel.