What is CVE-2021-25386?

CVE-2021-25386 is a critical-severity vulnerability in Google Android, classified under Stack-based Buffer Overflow. CVSS score: 9.0/10. Published 2021-06-11.

How severe is CVE-2021-25386?

Critical severity. CVSS v3 base score is 9.0 out of 10.

Buffer overflow in Google Android

CVE-2021-25386

An improper input validation vulnerability in sdfffd_parse_chunk_FVER() in libsdffextractor library prior to SMR MAY-2021 Release 1 allows attackers to execute arbitrary code on mediaextractor process.

Vulnerability class: Buffer Overflow

Published 2021-06-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (48.4th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Google Android — versions 8.1, 9.0, 10.0
Samsung Mobile Devices — versions O(8.1), P(9.x), Q(10.0), R(11.0)

Weakness classification (CWE)

References

security.samsungmobile.com/securityUpdate.smsb (Vendor Advisory)

Frequently asked questions

What is CVE-2021-25386?: CVE-2021-25386 is a critical-severity vulnerability in Google Android, classified under Stack-based Buffer Overflow. CVSS score: 9.0/10. Published 2021-06-11.
How severe is CVE-2021-25386?: Critical severity. CVSS v3 base score is 9.0 out of 10.