CVE-2021-39802

HIGH

Android Kernel - Local Privilege Escalation via Shared Memory Permissions Bypass

Title source: llm
STIX 2.1

Description

In change_pte_range of mprotect.c , there is a possible way to make a shared mmap writable due to a permissions bypass. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-213339151References: Upstream kernel

References (1)

Core 1
Core References
Patch, Vendor Advisory x_refsource_misc
https://source.android.com/security/bulletin/2022-04-01

Scores

CVSS v3 7.8
EPSS 0.0014
EPSS Percentile 4.1%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-863
Status published
Products (1)
google/android
Published Apr 12, 2022
Tracked Since Feb 18, 2026