Description
In appendFormatV of String8.cpp, there is a possible out of bounds write due to incorrect error handling. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-8.1 Android-9 Android-10 Android-11 Android-8.0Android ID: A-161894517
Exploits (1)
nomisec
WORKING POC
by nanopathi · poc
https://github.com/nanopathi/system_core_AOSP10_r33_CVE-2020-0421
References (1)
Core 1
Core References
Patch, Vendor Advisory x_refsource_misc
https://source.android.com/security/bulletin/2020-10-01
Scores
CVSS v3
7.8
EPSS
0.0001
EPSS Percentile
2.0%
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-755
CWE-787
Status
published
Products (5)
google/android
8.0
google/android
8.1
google/android
9.0
google/android
10.0
google/android
11.0
Published
Oct 14, 2020
Tracked Since
Feb 18, 2026