What is CVE-2025-20979?

CVE-2025-20979 is a high-severity vulnerability in Google Android, classified under Out-of-bounds Write. CVSS score: 8.4/10. Published 2025-05-07.

How severe is CVE-2025-20979?

High severity. CVSS v3 base score is 8.4 out of 10.

Buffer overflow in Google Android

CVE-2025-20979

Out-of-bounds write in libsavscmn prior to Android 15 allows local attackers to execute arbitrary code.

Vulnerability class: Buffer Overflow

Published 2025-05-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (0.2th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 0th percentile — 0.2% 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
Samsung Mobile Libsavscmn — versions Android 15

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

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

Frequently asked questions

What is CVE-2025-20979?: CVE-2025-20979 is a high-severity vulnerability in Google Android, classified under Out-of-bounds Write. CVSS score: 8.4/10. Published 2025-05-07.
How severe is CVE-2025-20979?: High severity. CVSS v3 base score is 8.4 out of 10.