EUVD-2026-21832Severity 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
Out-of-bounds write vulnerability in the kernel module. Impact: Successful exploitation of this vulnerability will affect availability and confidentiality.
AnalysisAI
Out-of-bounds write vulnerability in Huawei HarmonyOS and EMUI kernel modules allows local privileged attackers to achieve arbitrary memory corruption, potentially compromising system confidentiality and availability. The vulnerability requires high privilege context and nontrivial user interaction to trigger, limiting real-world exploitation scope despite moderate CVSS scoring.
Technical ContextAI
The vulnerability stems from improper input validation (CWE-20) in kernel module code, manifesting as a buffer overflow condition that permits out-of-bounds memory writes. This class of defect typically arises when kernel drivers or low-level system components fail to enforce bounds checking on user-supplied data or internal buffer operations. The affected products-Huawei HarmonyOS (all versions) and EMUI (all versions) per the CPE strings-both rely on kernel-level modules that interface with hardware drivers and system services. The attack surface is constrained by the CVSS vector (AV:L) requiring local system access and the PR:H privilege requirement, indicating exploitation demands root or equivalent kernel-mode context.
RemediationAI
Users should consult Huawei's official security bulletin at https://consumer.huawei.com/en/support/bulletin/2026/4/ for specific patched firmware versions applicable to their HarmonyOS or EMUI device model. Patch availability and version designations vary by device SKU and regional distribution. In the interim, restrict kernel module loading to trusted administrators and monitor system logs for anomalous memory access patterns. Ensure devices remain in managed environments where privilege escalation to root is restricted.
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Same weakness CWE-20 – Improper Input Validation
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
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