What is CVE-2021-0870?

CVE-2021-0870 is a high-severity vulnerability in Google Android, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 8.1/10. Published 2021-10-22.

How severe is CVE-2021-0870?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Google Android

CVE-2021-0870

In RW_SetActivatedTagType of rw_main.cc, there is possible memory corruption due to a race condition. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-9 Android-10 Android-11 Android-8.1Android ID: A-192472262

Vulnerability class: Race Condition

Published 2021-10-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.070 (94.0th percentile), scored 2026-10-06.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.070 · newest: 0.070 · change: 0.000

Affected products

Google Android — versions 8.1, 9.0, 10.0
Android — versions Android-9 Android-10 Android-11 Android-8.1

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

source.android.com/security/bulletin/2021-10-01 (Patch, Vendor Advisory)
packetstormsecurity.com/files/164704/Android-NFC-Type-Confusion.html (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2021-0870?: CVE-2021-0870 is a high-severity vulnerability in Google Android, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 8.1/10. Published 2021-10-22.
How severe is CVE-2021-0870?: High severity. CVSS v3 base score is 8.1 out of 10.