CVE-2022-22256Public exploit

Kernel-address disclosure via unrestricted hwlog ioctl

Published Apr 11, 2022 · Updated Aug 3, 2024

Improper access control in Huawei HarmonyOS 2.0 and affected EMUI releases allows local users to disclose randomized kernel pointers. The LOGGER_MEMCHECK_STACK_READ ioctl exposes the memcheck MTYPE_KERN_VMALLOC query through /dev/hwlog_dubai, whose permissive DAC and SELinux rules let untrusted apps receive raw pointers when symbolization fails. Any unprivileged process on an affected device can use the disclosure to defeat KASLR; no direct modification or service interruption is reported.

CVSS severity7.5
High
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Huawei HarmonyOS 2.0 and affected EMUI releases allows local users to disclose randomized kernel pointers. The LOGGER_MEMCHECK_STACK_READ ioctl exposes the memcheck MTYPE_KERN_VMALLOC query through /dev/hwlog_dubai, whose permissive DAC and SELinux rules let untrusted apps receive raw pointers when symbolization fails. Any unprivileged process on an affected device can use the disclosure to defeat KASLR; no direct modification or service interruption is reported.

The record

CVE
CVE-2022-22256
Published
Apr 11, 2022
Updated
Aug 3, 2024
Vendor
Huawei Technologies Co., Ltd.
Product
HarmonyOS
Classifications
Unavailable
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 11, 2022CVE 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 privilegesunauthenticated

What is affected?

Huawei Technologies Co., Ltd. · HarmonyOSversion=2.0
MindSpore · EMUIversion=10.0.0; version=10.1.0; version=10.1.1; version=11.0.0; version=11.0.1; version=12.0.0

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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