What is CVE-2020-0407?

CVE-2020-0407 is a medium-severity vulnerability in Google Android, classified under Use of Insufficiently Random Values. CVSS score: 4.4/10. Published 2020-09-17.

How severe is CVE-2020-0407?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in Google Android

CVE-2020-0407

In various functions in fscrypt_ice.c and related files in some implementations of f2fs encryption that use encryption hardware which only supports 32-bit IVs (Initialization Vectors), 64-bit IVs are used and later are truncated to 32 bits. This may cause IV reuse and thus weakened disk encryption. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-153450752References: N/A

Published 2020-09-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.001 (1.1th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Google Android
Android — versions Android kernel

Weakness classification (CWE)

CWE-330 — Use of Insufficiently Random Values

References

source.android.com/security/bulletin/2020-09-01 (Vendor Advisory)

Frequently asked questions

What is CVE-2020-0407?: CVE-2020-0407 is a medium-severity vulnerability in Google Android, classified under Use of Insufficiently Random Values. CVSS score: 4.4/10. Published 2020-09-17.
How severe is CVE-2020-0407?: Medium severity. CVSS v3 base score is 4.4 out of 10.