CVE-2021-0306

In addAllPermissions of PermissionManagerService.java, there is a possible permissions bypass...

7.8 HighPublic exploitFix available

In addAllPermissions of PermissionManagerService.java, there is a possible permissions bypass when upgrading major Android versions which allows an app to gain the android.permission.ACTIVITY_RECOGNITION permission without user confirmation. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android; Versions: Android-11, Android-8.0, Android-8.1, Android-9, Android-10; Android ID: A-154505240.

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.27%Up 0.1 points since Apr 14, 2021

What each source reports

NVD Score used 7.8

Record: CVE-2021-0306
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.2 HighAV:L/AC:L/Au:N/C:C/I:C/A:C
Weakness: CWE-269
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-0306
Updated: 2026-11-02

EUVDEUVD-2021-2925 No score

Record: EUVD-2021-2925
Updated: 2026-11-03

GitHub AdvisoriesGHSA-9hcw-xp2g-53qq No score

In addAllPermissions of PermissionManagerService.java, there is a possible permissions bypass...

Record: GHSA-9hcw-xp2g-53qq
Weakness: CWE-269
Updated: 2026-11-02

OSVASB-A-154505240 No score

Record: ASB-A-154505240
Updated: 2026-11-09

Affected products

google android

Affected packages

Affected packages
Package	Affected	Fixed
`platform/frameworks/base` Android	8.0:0 up to 8.0:2021-01-01, plus listed versions 8.0	8.0:2021-01-01
`platform/frameworks/base` Android	8.1:0 up to 8.1:2021-01-01, plus listed versions 8.1	8.1:2021-01-01
`platform/frameworks/base` Android	9:0 up to 9:2021-01-01, plus listed versions 9	9:2021-01-01
`platform/frameworks/base` Android	10:0 up to 10:2021-01-01, plus listed versions 10	10:2021-01-01
`platform/frameworks/base` Android	11:0 up to 11:2021-01-01, plus listed versions 11	11:2021-01-01

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	nanopathi/framework_base_AOSP10_r33_CVE-2021-0306_CVE-2021-0317	2022-04-23

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, PoC in GitHub

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

In short

CVE-2021-0306 is a high vulnerability (CVSS 7.8) in Google Android, published January 1, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.27%, the 19th percentile. Fixed in platform/frameworks/base 8.0:2021-01-01.