Buffer overflow in Samsung Android

CVE-2025-21034

Out-of-bounds write in libsavsvc.so prior to SMR Sep-2025 Release 1 allows local attackers to potentially execute arbitrary code.

Vulnerability class: Buffer Overflow

EPSS: 0.001 (2.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Samsung Android — versions 13.0, 14.0, 15.0
Samsung Mobile Devices — versions SMR Sep-2025 Release in Android 13, 14, 15, 16

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

mobile.security@samsung.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-21034?: CVE-2025-21034 is a medium-severity vulnerability in Samsung Android, classified under Out-of-bounds Write. CVSS score: 4.0/10. Published 2025-09-03.
How severe is CVE-2025-21034?: Medium severity. CVSS v3 base score is 4.0 out of 10.
Is CVE-2025-21034 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.