CVE-2026-34849

EUVD-2026-21829 LOW

Race Condition (CWE-362)

2026-04-13 huawei

Race Condition Information Disclosure

2.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

2.5 LOW

AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Lifecycle Timeline

Analysis Generated

Apr 13, 2026 - 05:26 vuln.today

EUVD ID Assigned

Apr 13, 2026 - 05:15 euvd

EUVD-2026-21829

Analysis Generated

Apr 13, 2026 - 05:15 vuln.today

CVE Published

Apr 13, 2026 - 03:58 nvd

LOW 2.5

DescriptionCVE.org

UAF vulnerability in the screen management module. Impact: Successful exploitation of this vulnerability may affect availability.

AnalysisAI

Use-after-free vulnerability in HarmonyOS screen management module allows local, unauthenticated attackers with user interaction to cause denial of service through a race condition. CVSS score of 2.5 reflects low severity with availability impact only; no confidentiality or integrity compromise. No public exploit code or active exploitation confirmed at time of analysis.

Technical ContextAI

The vulnerability exists in HarmonyOS screen management module as a use-after-free (CWE-362: Concurrent Execution Using Shared Resource with Improper Synchronization) condition. UAF vulnerabilities occur when a program references memory that has been freed, typically due to improper synchronization between concurrent operations or inadequate lifecycle management. In this case, a race condition in screen resource management allows an attacker to access or manipulate freed memory objects. The attack requires local access and user interaction (triggering UI actions), making it a client-side vulnerability rather than a network-facing one. The race condition nature suggests the vulnerability manifests under specific timing windows during concurrent screen state transitions.

RemediationAI

Apply the security patch released by Huawei through the official security bulletin at https://consumer.huawei.com/en/support/bulletin/2026/4/. Users should check the bulletin for their specific device model to obtain the patched HarmonyOS version, as fix versions vary by device hardware platform. Enable automatic system updates to receive patches as released. Until patching is possible, minimize use of screen management features and close unnecessary applications to reduce likelihood of triggering the race condition during concurrent screen state transitions, though this is not a reliable workaround.