CVE-2022-20582

Local privilege escalation via firmware buffer overwrite

Published Dec 16, 2022 · Updated Apr 18, 2025

Out-of-bounds write in Android kernel LDFW code allows local users to elevate privileges through malformed firmware-buffer data. The ppmp_unprotect_mfcfw_buf function in drm_fw.c insufficiently validates input before writing beyond the intended buffer boundary. Exploitation requires local low-privileged access to an affected Pixel device, needs no user interaction, and grants elevated execution privileges.

CVSS severity7.8
High
EPSS probability0.10%
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 Android kernel LDFW code allows local users to elevate privileges through malformed firmware-buffer data. The ppmp_unprotect_mfcfw_buf function in drm_fw.c insufficiently validates input before writing beyond the intended buffer boundary. Exploitation requires local low-privileged access to an affected Pixel device, needs no user interaction, and grants elevated execution privileges.

The record

CVE
CVE-2022-20582
Published
Dec 16, 2022
Updated
Apr 18, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-787, T1068
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?

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?

Google Cloud · Androidversion=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

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-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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