CVE-2023-20771

Local privilege escalation via display race

Published Jul 4, 2023 · Updated Dec 4, 2024

A display race in MediaTek chipsets running Android 12.0 allows local users with System privileges to escalate privileges. The display component accesses a shared resource concurrently without proper synchronization, allowing the race to corrupt memory. Exploitation requires System execution privileges and no user interaction; MediaTek has not disclosed the affected function or object.

CVSS severity6.4
Medium
EPSS probability0.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A display race in MediaTek chipsets running Android 12.0 allows local users with System privileges to escalate privileges. The display component accesses a shared resource concurrently without proper synchronization, allowing the race to corrupt memory. Exploitation requires System execution privileges and no user interaction; MediaTek has not disclosed the affected function or object.

The record

CVE
CVE-2023-20771
Published
Jul 4, 2023
Updated
Dec 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, CWE-662, CWE-362, T1404
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 4, 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

6.4NIST NVDCVSS:3.1/AV:L/AC:H/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
CWE-662Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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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