What is CVE-2021-25488?

CVE-2021-25488 is a medium-severity vulnerability in Google Android, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2021-10-06.

How severe is CVE-2021-25488?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Out-of-bounds Read in Google Android

CVE-2021-25488

Lack of boundary checking of a buffer in recv_data() of modem interface driver prior to SMR Oct-2021 Release 1 allows OOB read.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.001 (1.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.1% 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 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)

CWE-125 — Out-of-bounds Read

References

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

Frequently asked questions

What is CVE-2021-25488?: CVE-2021-25488 is a medium-severity vulnerability in Google Android, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2021-10-06.
How severe is CVE-2021-25488?: Medium severity. CVSS v3 base score is 5.5 out of 10.