CVE-2026-24927 is a use-after-free vulnerability classified under CWE-416 found in Huawei's HarmonyOS, specifically within the frequency modulation module. This vulnerability arises from improper handling of memory, where a previously freed object is accessed, leading to out-of-bounds memory access. Such conditions can cause system instability or crashes, impacting the availability of the affected device or service. The affected versions include HarmonyOS 4.0.0 through 4.3.1. The CVSS 3.1 base score is 5.5, reflecting a medium severity level, with an attack vector requiring local access (AV:L), low attack complexity (AC:L), low privileges (PR:L), no user interaction (UI:N), and an impact limited to availability (A:H) without affecting confidentiality or integrity. No public exploits have been reported, indicating that exploitation in the wild is not currently observed. The vulnerability's exploitation could lead to denial of service conditions, potentially disrupting services running on HarmonyOS devices, which are increasingly used in IoT and telecommunications sectors. The lack of patches at the time of reporting emphasizes the need for vigilance and proactive mitigation.

For European organizations, the primary impact of CVE-2026-24927 is on system availability. Disruptions caused by this vulnerability could affect critical services running on HarmonyOS devices, especially in telecommunications, IoT deployments, and smart infrastructure where Huawei hardware and software are prevalent. Availability issues could lead to downtime, service interruptions, and operational inefficiencies. While confidentiality and integrity are not directly impacted, denial of service conditions can indirectly affect business continuity and user trust. Organizations relying on Huawei devices for network infrastructure or endpoint devices may face increased risk if attackers gain local access. The medium severity suggests moderate risk, but the potential for cascading effects in critical systems makes timely mitigation important.

1. Monitor Huawei's official security advisories for patches addressing CVE-2026-24927 and apply them promptly once released. 2. Restrict local access to HarmonyOS devices by enforcing strict access controls and limiting physical or remote local user privileges. 3. Implement network segmentation to isolate critical HarmonyOS-based systems, reducing the risk of lateral movement if exploitation occurs. 4. Employ endpoint detection and response (EDR) solutions capable of monitoring unusual memory access patterns or crashes indicative of use-after-free exploitation attempts. 5. Conduct regular security audits and penetration tests focusing on local privilege escalation and memory corruption vulnerabilities. 6. Educate users and administrators about the risks of local access vulnerabilities and enforce policies to prevent unauthorized device access. 7. Where feasible, consider alternative platforms or additional security layers for critical systems until patches are available.