CVE-2023-21398

Local privilege escalation via sdksandbox overlay

Published Oct 30, 2023 · Updated Sep 6, 2024

Elevation of privilege in Google Android 14 sdksandbox allows local users to gain higher privileges through a StrandHogg-style overlay attack. A Framework logic error permits the overlay instead of preserving the intended sdksandbox privilege boundary, but Google has not disclosed the faulty function or validation step. A low-privileged local application can reach the flaw without user interaction, with confidentiality, integrity, and availability consequences inside the affected device.

CVSS severity7.8
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Elevation of privilege in Google Android 14 sdksandbox allows local users to gain higher privileges through a StrandHogg-style overlay attack. A Framework logic error permits the overlay instead of preserving the intended sdksandbox privilege boundary, but Google has not disclosed the faulty function or validation step. A low-privileged local application can reach the flaw without user interaction, with confidentiality, integrity, and availability consequences inside the affected device.

The record

CVE
CVE-2023-21398
Published
Oct 30, 2023
Updated
Sep 6, 2024
Vendor
Google
Product
Android
Classifications
T1404
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 6, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Google · Androidversion=14

Published CVSS scores

7.8NIST National Vulnerability DatabaseCVSS: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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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