EUVD-2026-21830Severity by source
AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H
Lifecycle Timeline
4DescriptionCVE.org
UAF vulnerability in the kernel module. Impact: Successful exploitation of this vulnerability will affect availability and confidentiality.
AnalysisAI
Use-after-free vulnerability in HarmonyOS and EMUI kernel modules enables local attackers with high privileges to disclose sensitive information and cause denial of service through improper memory management. CVSS 5.7 reflects limited attack scope (local only, requires elevated privileges, high attack complexity), though the vulnerability impacts both confidentiality and availability. No public exploit code or active exploitation has been confirmed at time of analysis.
Technical ContextAI
CWE-416 (Use-After-Free) describes a memory safety defect in kernel code where freed memory is dereferenced after deallocation, potentially leading to information disclosure or system instability. The vulnerability affects HarmonyOS and EMUI kernel modules (cpe:2.3:a:huawei:harmonyos and cpe:2.3:a:huawei:emui), Huawei's operating systems deployed across smartphones and IoT devices. Local attackers with high-privilege context (PR:H in CVSS vector) can trigger the vulnerable code path through kernel interactions, leading to out-of-bounds memory access. The high attack complexity (AC:H) suggests exploitation requires specific conditions or precise timing to trigger the UAF condition reliably.
RemediationAI
Consult the Huawei security bulletin at https://consumer.huawei.com/en/support/bulletin/2026/4/ for vendor-released patches specific to your HarmonyOS or EMUI version. Apply the recommended security update immediately. If patch availability or version-specific guidance is unclear from the bulletin, contact Huawei support for device-specific remediation instructions. As a temporary mitigation pending patch deployment, restrict local access to high-privilege contexts and disable unnecessary kernel modules or services if operationally feasible.
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Same weakness CWE-416 – Use After Free
View allSame technique Information Disclosure
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External POC / Exploit Code
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