CVE-2023-21116

In verifyReplacingVersionCode of InstallPackageHelper.java, there is a possible way to downgrade...

6.7 MediumFix available

In verifyReplacingVersionCode of InstallPackageHelper.java, there is a possible way to downgrade system apps below system image version due to a logic error in the code. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-12 Android-12L Android-13Android ID: A-256202273

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: High
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.09%Unchanged since May 16, 2023

What each source reports

NVD Score used 6.7

Record: CVE-2023-21116
CVSS 3.1: 6.7 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-863
Updated: 2026-11-02

CVE List 6.7

Record: CVE-2023-21116
CVSS 3.1: 6.7 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-863
Updated: 2026-11-02

EUVDEUVD-2023-25284 6.7

Record: EUVD-2023-25284
CVSS 3.1: 6.7 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-f7h3-xrj3-8hhr 6.7

In verifyReplacingVersionCode of InstallPackageHelper.java, there is a possible way to downgrade...

Record: GHSA-f7h3-xrj3-8hhr
CVSS 3.1: 6.7 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-863
Updated: 2026-11-02

OSVASB-A-256202273 No score

Record: ASB-A-256202273
Updated: 2026-11-10

Affected products

google android

Affected packages

Affected packages
Package	Affected	Fixed
`platform/frameworks/base` Android	13-next:0 up to 13-next:2023-05-01, plus listed versions 13-next	13-next:2023-05-01
`platform/frameworks/base` Android	11:0 up to 11:2023-05-01, plus listed versions 11	11:2023-05-01
`platform/frameworks/base` Android	12:0 up to 12:2023-05-01, plus listed versions 12	12:2023-05-01
`platform/frameworks/base` Android	12L:0 up to 12L:2023-05-01, plus listed versions 12L	12L:2023-05-01
`platform/frameworks/base` Android	13:0 up to 13:2023-05-01, plus listed versions 13	13:2023-05-01

History

History
Recorded	Changed	Sources
Nov 5, 2026	facts	OSV
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-21116 is a medium vulnerability (CVSS 6.7) in Google Android, published May 1, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.09%, the 0th percentile. Fixed in platform/frameworks/base 13-next:2023-05-01.