What is CVE-2021-25475?

CVE-2021-25475 is a low-severity vulnerability in Google Android, classified under Heap-based Buffer Overflow. CVSS score: 3.9/10. Published 2021-10-06.

How severe is CVE-2021-25475?

Low severity. CVSS v3 base score is 3.9 out of 10.

Buffer overflow in Google Android

CVE-2021-25475

A possible heap-based buffer overflow vulnerability in DSP kernel driver prior to SMR Oct-2021 Release 1 allows arbitrary memory write and code execution.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 3.9 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.001 (1.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.8% 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 — versions 10.0, 11.0
Samsung Exynos 2100
Samsung Exynos 980
Samsung Exynos 9830
Samsung Mobile Devices — versions Q(10.0), R(11.0)

Weakness classification (CWE)

References

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

Frequently asked questions

What is CVE-2021-25475?: CVE-2021-25475 is a low-severity vulnerability in Google Android, classified under Heap-based Buffer Overflow. CVSS score: 3.9/10. Published 2021-10-06.
How severe is CVE-2021-25475?: Low severity. CVSS v3 base score is 3.9 out of 10.