What is CVE-2021-25479?

CVE-2021-25479 is a high-severity vulnerability in Google Android, classified under Heap-based Buffer Overflow. CVSS score: 7.2/10. Published 2021-10-06.

How severe is CVE-2021-25479?

High severity. CVSS v3 base score is 7.2 out of 10.

Buffer overflow in Google Android

CVE-2021-25479

A possible heap-based buffer overflow vulnerability in Exynos CP Chipset 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 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (45.3th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.3% 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 Exynos
Samsung Mobile Devices — versions O(8.1), P(9.0), Q(10.0), R(11.0)

Weakness classification (CWE)

References

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

Frequently asked questions

What is CVE-2021-25479?: CVE-2021-25479 is a high-severity vulnerability in Google Android, classified under Heap-based Buffer Overflow. CVSS score: 7.2/10. Published 2021-10-06.
How severe is CVE-2021-25479?: High severity. CVSS v3 base score is 7.2 out of 10.