What is CVE-2020-0421?

CVE-2020-0421 is a high-severity vulnerability in Google Android, classified under Improper Handling of Exceptional Conditions. CVSS score: 7.8/10. Published 2020-10-14.

How severe is CVE-2020-0421?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2020-0421 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Google Android

CVE-2020-0421

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

EPSS: 0.003 (18.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Google Android — versions 8.0, 8.1, 9.0
N/a Android — versions Android-8.1 Android-9 Android-10 Android-11 Android-8.0

Weakness classification (CWE)

Public proof-of-concept exploits

References

security@android.com (Patch, x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2020-0421?: CVE-2020-0421 is a high-severity vulnerability in Google Android, classified under Improper Handling of Exceptional Conditions. CVSS score: 7.8/10. Published 2020-10-14.
How severe is CVE-2020-0421?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2020-0421 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.