CVE-2026-34858

Use‑After‑Free in HarmonyOS Communication Module Impacting Availability

Published Apr 13, 2026 CVSS 3.1 · 4.1 Medium EPSS < 1% KEV · Not listed
Description
UAF vulnerability in the communication module.
Impact: Successful exploitation of this vulnerability may affect availability.

Analysis

AI-generated

Technical impact

The vulnerability disclosed is a use‑after‑free condition located in the communication module of Huawei HarmonyOS. Successful exploitation may result in the loss of availability for the affected module or service. The weakness is identified as a race‑condition error (CWE‑362).

Affected Systems

Huawei HarmonyOS devices such as consumer phones, smart wearables, and other embedded systems running the HarmonyOS operating system are affected. The advisory does not list any specific product versions.

Risk and Exploitability

The CVSS score of 4.1 indicates a low to moderate risk with respect to availability impact. EPSS data is not available, and the vulnerability is not listed in the CISA KEV catalog. The exact attack vector is not specified; however, a use‑after‑free in a low‑level communication component generally requires either local input or the ability to send crafted messages to the device. Because no public exploit is documented, the current threat level is considered low, but monitoring for new developments remains prudent.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply any firmware or OS patch released by Huawei for HarmonyOS when it becomes available.
  • If no patch is available, inhibit or restrict applications that interact directly with the communication module, if possible.
  • Monitor device logs for signs of anomalous behavior or crashes that could indicate exploitation attempts.
  • Keep the device firmware and OS updated to the latest supported versions and enable automatic updates whenever possible.

Generated by OpenCVE AI on April 13, 2026 at 06:53 UTC.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:o:huawei:harmonyos:5.1.0:*:*:*:*:*:*:*
cpe:2.3:o:huawei:harmonyos:5.1.1:*:*:*:*:*:*:*
cpe:2.3:o:huawei:harmonyos:6.0.0:*:*:*:*:*:*:*
Type Values Removed Values Added
Title Use‑After‑Free in HarmonyOS Communication Module Impacting Availability
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Huawei
Huawei harmonyos
Vendors & Products Huawei
Huawei harmonyos
Type Values Removed Values Added
Description UAF vulnerability in the communication module. Impact: Successful exploitation of this vulnerability may affect availability.
Weaknesses CWE-362
References
Metrics cvssV3_1

{'score': 4.1, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses
  • CWE-362

    Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Sources

Status
PUBLISHED
Assigner
huawei
Published
Updated
Apr 13, 2026, 1:28 PM
Reserved
Mar 31, 2026, 1:11 AM
Status
Analyzed
Published
Apr 13, 2026, 5:16 AM
Modified
Oct 26, 2026, 12:10 AM