CVE-2021-46786

Out-of-bounds memory access via unchecked audio parameters

Published May 13, 2022 · Updated Aug 4, 2024

Out-of-bounds memory access in the audio module of Huawei HarmonyOS 2.0 and EMUI 12.0.0 allows local users to submit crafted parameters. The module insufficiently verifies parameters transferred from application space before using them for memory access; Huawei has not disclosed the affected routine or exact bounds error. A local application must reach the audio-module interface, and the documented consequence is limited to out-of-bounds memory access.

CVSS severity9.8
Critical
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds memory access in the audio module of Huawei HarmonyOS 2.0 and EMUI 12.0.0 allows local users to submit crafted parameters. The module insufficiently verifies parameters transferred from application space before using them for memory access; Huawei has not disclosed the affected routine or exact bounds error. A local application must reach the audio-module interface, and the documented consequence is limited to out-of-bounds memory access.

The record

CVE
CVE-2021-46786
Published
May 13, 2022
Updated
Aug 4, 2024
Vendor
Huawei Technologies Co., Ltd.
Product
HarmonyOS
Classifications
CWE-119
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. May 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Huawei Technologies Co., Ltd. · HarmonyOSversion=2.0
MindSpore · EMUIversion=12.0.0

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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