Samsung Mobile Devices Improper Access Control Vulnerability (CVE-2021-25369)

Samsung mobile devices using Mali GPU contains an improper access control vulnerability in sec_log file. Exploitation of the vulnerability exposes sensitive kernel information to the userspace. This vulnerability was chained with CVE-2021-25337 and CVE-2021-25370.

Published Mar 26, 2021 · Updated May 17, 2026

Why patchRisk explained in plain English

Worst-case scenarioIf unpatched

A local attacker, without authentication, can achieve full data confidentiality loss. Federal agencies are required to remediate by 2022-11-29 under CISA BOD 22-01.

How the attack worksNo clicks needed

This is a Information Disclosure (CWE-200) vulnerability in Samsung Mobile Devices. An improper access control vulnerability in sec_log file prior to SMR MAR-2021 Release 1 exposes sensitive kernel information to userspace. Exploitation requires local access, low attack complexity, no authentication required, and no user interaction required.

Am I affected?Quick check

Probably yes if any of these apply:

●IT Security

●Running android: 8.0, 8.1, 9.0, 10.0

Real-world incidentsWhat we've seen

CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2022-11-08 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2022-11-29.

How to patch

Manual remediation steps

Identify affected hosts: query inventory for general installs in scope.

Apply the vendor security update referenced in CVE-2021-25369's advisory. No specific KB/version is encoded yet — consult the linked MSRC/vendor URL.

Verify the fix per the vendor's published verification steps.

Document the remediation in your change ticket and re-scan with your vulnerability scanner to confirm closure.

PowerShell automationComing soon

No tested PowerShell script for this entry yet. We’re prioritising automation based on user demand.

References

↗ CVE-2021-25369 ↗ MSRC Advisory ↗ NVD ↗ Vendor Advisory