CVE-2022-42528

Local information disclosure via ffa_mrd_prot logic error

Published Mar 24, 2023 · Updated Feb 25, 2025

Information disclosure in Arm Trusted Firmware-A for the Android kernel allows local users to read protected information through ffa_mrd_prot. The logic error is in ffa_mrd_prot in shared_mem.c, but Google has not published the incorrect check or operation that exposes the data. A local low-privilege execution context is required, no user interaction is needed, and the published impact is limited to confidentiality.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Arm Trusted Firmware-A for the Android kernel allows local users to read protected information through ffa_mrd_prot. The logic error is in ffa_mrd_prot in shared_mem.c, but Google has not published the incorrect check or operation that exposes the data. A local low-privilege execution context is required, no user interaction is needed, and the published impact is limited to confidentiality.

The record

CVE
CVE-2022-42528
Published
Mar 24, 2023
Updated
Feb 25, 2025
Vendor
Arm
Product
Trusted Firmware-A
Classifications
T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 2025Record 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 privilegesauthenticated

What is affected?

Arm · Trusted Firmware-Aversion=Android kernel

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1005Data from Local System

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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