CVE-2021-25489

Name: CVE-2021-25489
Creator: NVD / NIST
Published: 2021-10-06T18:15:09.667+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10Actively ExploitedEPSS 0.52%

Last modified Jun 17, 2026

CVE-2021-25489 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Assuming radio permission is gained, missing input validation in modem interface driver prior to SMR Oct-2021 Release 1 results in format string bug leading to kernel panic.. CISA has confirmed active exploitation in the wild. EPSS estimates a 0.52% chance of exploitation in the next 30 days.

Description

Assuming radio permission is gained, missing input validation in modem interface driver prior to SMR Oct-2021 Release 1 results in format string bug leading to kernel panic.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.52%

40.0th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Jul 20, 2023.

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Samsung	Android	8.1	—
Samsung	Android	9.0	Smr-Apr-2021-R1
Samsung	Android	10.0	Smr-Apr-2021-R1
Samsung	Android	11.0	Smr-Apr-2021-R1

References

https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=10Vendor Advisory
https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=10Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25489US Government Resource

Timeline

Published: Oct 6, 2021
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-25489?

Assuming radio permission is gained, missing input validation in modem interface driver prior to SMR Oct-2021 Release 1 results in format string bug leading to kernel panic.

How severe is CVE-2021-25489?

CVE-2021-25489 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.52% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2021-25489?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-25489?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST