EUVD-2026-21838Severity by source
AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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 Huawei HarmonyOS and EMUI kernel module allows local attackers without privileges to read sensitive memory, modify data, and crash the system (confidentiality, integrity, and availability impact). The vulnerability affects an unspecified range of HarmonyOS and EMUI versions; no public exploit code or active exploitation has been identified at the time of analysis. CVSS score of 5.9 reflects moderate local attack risk with low complexity.
Technical ContextAI
This is a use-after-free (UAF) vulnerability classified under CWE-416, which occurs when code accesses memory after it has been deallocated. In the context of a kernel module, an attacker can trigger a freed memory region to be reused, potentially reading sensitive kernel data or executing arbitrary code with kernel privileges. The vulnerability resides in Huawei's HarmonyOS and EMUI operating systems, which power Huawei mobile devices. The local attack vector (AV:L) indicates the attacker must have local code execution capability on the target device to trigger the flaw. The lack of privilege requirement (PR:N) means any local process, including unprivileged user applications, can exploit this condition.
RemediationAI
Check Huawei's official security bulletin pages (https://consumer.huawei.com/en/support/bulletin/2026/4/ and https://consumer.huawei.com/en/support/bulletinvision/2026/4/) for patched firmware versions specific to your HarmonyOS or EMUI device model. Install the latest security update provided by Huawei through the device's over-the-air update mechanism. As a temporary mitigation, restrict installation of untrusted applications and monitor system stability for crashes or unexpected behavior. No CVE-specific patch version number is independently confirmed in the available data; consult Huawei's bulletin for exact fixed build numbers.
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Same weakness CWE-416 – Use After Free
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External POC / Exploit Code
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