CVE-2022-20057

Local privilege escalation via unhandled btif errors

Published Mar 9, 2022 · Updated Aug 3, 2024

Memory corruption in btif on MediaTek chipsets running Android 11.0 or 12.0 allows local users to escalate privileges. The btif component detects an error condition but fails to act on it, leaving a memory state that can become corrupted. Exploitation requires existing System execution privileges and user interaction, and the resulting privilege gain is local to the device.

CVSS severity6.5
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

Memory corruption in btif on MediaTek chipsets running Android 11.0 or 12.0 allows local users to escalate privileges. The btif component detects an error condition but fails to act on it, leaving a memory state that can become corrupted. Exploitation requires existing System execution privileges and user interaction, and the resulting privilege gain is local to the device.

The record

CVE
CVE-2022-20057
Published
Mar 9, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-390, CWE-755, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Mar 9, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
4.4NIST NVDAV:L/AC:M/Au:N/C:P/I:P/A:P

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-390Detection of Error Condition Without Action
CWE-755Improper Handling of Exceptional Conditions
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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