CVE-2022-20231

Local privilege escalation via unchecked FIQ request

Published Sep 14, 2022 · Updated Aug 3, 2024

Out-of-bounds write in Google Trusty's Android kernel ARM GIC code allows local users to elevate privileges without interaction. The smc_intc_request_fiq function in arm_gic.c fails to validate input before writing outside the intended bounds. System execution privileges are required, and successful exploitation can compromise confidentiality, integrity, and availability.

CVSS severity6.7
Medium
EPSS probability0.11%
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 write in Google Trusty's Android kernel ARM GIC code allows local users to elevate privileges without interaction. The smc_intc_request_fiq function in arm_gic.c fails to validate input before writing outside the intended bounds. System execution privileges are required, and successful exploitation can compromise confidentiality, integrity, and availability.

The record

CVE
CVE-2022-20231
Published
Sep 14, 2022
Updated
Aug 3, 2024
Vendor
Google
Product
Trusty
Classifications
CWE-787, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 14, 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=Android kernel

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Google · Trustyversion=Android kernel

Published CVSS scores

6.7NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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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