CVE-2021-22295

Local device hang via page-fault permission bypass

Published Aug 6, 2021 · Updated Aug 3, 2024

Permission bypass in Huawei HarmonyOS 2.0 allows local users to hang the device by triggering a page fault in OsVmPageFaultHandler. Huawei identifies OsVmPageFaultHandler as the page-error locus but has not disclosed the exact permission check or memory operation that fails. Exploitation requires low-privileged local access; the documented consequence is device unavailability, not data exposure or modification.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Permission bypass in Huawei HarmonyOS 2.0 allows local users to hang the device by triggering a page fault in OsVmPageFaultHandler. Huawei identifies OsVmPageFaultHandler as the page-error locus but has not disclosed the exact permission check or memory operation that fails. Exploitation requires low-privileged local access; the documented consequence is device unavailability, not data exposure or modification.

The record

CVE
CVE-2021-22295
Published
Aug 6, 2021
Updated
Aug 3, 2024
Vendor
Huawei Technologies Co., Ltd.
Product
HarmonyOS
Classifications
CWE-276, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 6, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 privilegesauthenticated

What is affected?

Huawei Technologies Co., Ltd. · HarmonyOSversion=2.0

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.1NIST NVDAV:L/AC:L/Au:N/C:N/I:N/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
T1499Endpoint Denial of Service

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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