CVE-2022-20586

Local privilege escalation via improper DRAM address validation

Published Dec 16, 2022 · Updated Apr 18, 2025

Improper input validation in Google Pixel LDFW drm_access_control.c allows local users to escalate privileges in the Android kernel. The valid_out_of_special_sec_dram_addr function does not correctly reject an invalid value during special secure DRAM address checks; Google has not disclosed the rejected condition or resulting privileged operation. Exploitation requires local low-privileged access, needs no user interaction, and grants elevated privileges within the affected Pixel firmware.

CVSS severity7.8
High
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

Improper input validation in Google Pixel LDFW drm_access_control.c allows local users to escalate privileges in the Android kernel. The valid_out_of_special_sec_dram_addr function does not correctly reject an invalid value during special secure DRAM address checks; Google has not disclosed the rejected condition or resulting privileged operation. Exploitation requires local low-privileged access, needs no user interaction, and grants elevated privileges within the affected Pixel firmware.

The record

CVE
CVE-2022-20586
Published
Dec 16, 2022
Updated
Apr 18, 2025
Vendor
Google
Product
Pixel LDFW
Classifications
CWE-20, T1404
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 16, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 18, 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?

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  1. Affected versionversion=Android kernel

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google · Pixel LDFWversion=Android kernel

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1404Exploitation 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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