CVE-2021-25518

Name: CVE-2021-25518
Creator: NVD / NIST
Published: 2021-12-08T15:15:08.39+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.7/10EPSS 0.11%

Last modified Jun 17, 2026

CVE-2021-25518 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. An improper boundary check in secure_log of LDFW and BL31 prior to SMR Dec-2021 Release 1 allows arbitrary memory write and code execution.. EPSS estimates a 0.11% chance of exploitation in the next 30 days.

Description

An improper boundary check in secure_log of LDFW and BL31 prior to SMR Dec-2021 Release 1 allows arbitrary memory write and code execution.

Metrics

CVSS 3.1

6.7/10

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

EPSS Probability

0.11%

1.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Google	Android	9.0
Google	Android	10.0
Google	Android	11.0

References

https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=12Vendor Advisory
https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=12Vendor Advisory

Timeline

Published: Dec 8, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-25518?

An improper boundary check in secure_log of LDFW and BL31 prior to SMR Dec-2021 Release 1 allows arbitrary memory write and code execution.

How severe is CVE-2021-25518?

CVE-2021-25518 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.11% probability of exploitation in the next 30 days.

How do I fix CVE-2021-25518?

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-2021-25518?

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

Scan your code now

Source: NVD / NIST