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AndroidOperating system · Google

CVE-2023-20666

MEDIUM · 6.7 CVSS v3.1 Published 2023-04-06
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
69/100
Remediation priority · Elevated
Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In display drm, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07310651; Issue ID: ALPS07292173.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

A missing bounds check in the display DRM (Direct Rendering Manager) component allows an out-of-bounds write, which can be exploited for local privilege escalation. The vulnerability requires System-level execution privileges to exploit, and user interaction is not needed.

MitigationApply patch ALPS07310651 to address the missing bounds check in the display DRM component. This is a kernel/driver-level fix that should be integrated into the system image via OTA or firmware update.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
AndroidOperating system
Affected:= 12.0= 13.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check Android version
    Run 'getprop ro.build.version.release' or check Settings > About Phone > Android version
    Affected if The version is exactly 12.0 or 13.0 (not 12L, 12S, 13.0.0, or later point releases)
  2. Verify security patch level
    Run 'getprop ro.build.version.security_patch' or check Settings > About Phone > Security patch level
    Affected if The security patch level is earlier than the date when ALPS07310651 was released (patch date not specified in CVE data)
  3. Check kernel DRM driver version
    Run 'cat /proc/version' to identify the kernel version, then check if the display DRM module is loaded via 'lsmod | grep -i drm' or inspect /sys/module/drm*
    Affected if The DRM driver module exists and was not compiled with the bounds check fix (no direct file version check possible without source comparison)

You are affected if your device runs Android 12.0 or 13.0 exactly and has a security patch level older than the fix release date for CVE-2023-20666.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply patch ALPS07310651 to address the missing bounds check in the display DRM component. This is a kernel/driver-level fix that should be integrated into the system image via OTA or firmware update.

Recommended fix Moderate confidence

Latest Android Security Patch Level (contact device manufacturer for specific version containing ALPS07310651)

  1. 1. Check your device's current Android Security Patch Level in Settings > About Phone > Security Patch Level
  2. 2. Ensure your device has the latest Android system updates installed by checking for updates in Settings > System > Software Update
  3. 3. Contact your device manufacturer (e.g., Xiaomi, Oppo, Vivo, etc.) to confirm they have released a security update containing the MediaTek display DRM patch (Patch ID: ALPS07310651)
  4. 4. If available, install the latest security update that addresses CVE-2023-20666
  5. 5. Verify the Security Patch Level has been updated to include the fix for this vulnerability
Caveat Risk minimal; security updates typically have low risk of breaking changes. However, verify backup of important data before applying updates.

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Android Scoped from the published advisory
  • Consultation4.0 h
  • Implementation2.0 h
  • Testing6.0 h
  • Review / QA3.0 h
15.0 hours of engineering $2,600
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-20666 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data