Use After Free in DualDAR Prior to SMR Sep-2026 Release 1

Executive Summary

This vulnerability is a use-after-free issue in DualDAR, a component in Samsung devices, discovered before the September 2026 security release. A use-after-free occurs when a program continues to use memory after it has been freed, potentially allowing attackers to execute arbitrary code with root privileges.

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Detection Guidance

Detection of CVE-2026-21102 requires checking for use-after-free vulnerabilities in DualDAR components. No specific commands are provided in the context. Review Samsung's SMR Sep-2026 Release 1 or later for patches and monitor system logs for crashes or unexpected behavior in DualDAR processes.

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Impact Analysis

This vulnerability allows local attackers with high privileges to execute arbitrary code with root access. This could lead to complete device compromise, unauthorized data access, installation of malicious software, or bypassing security mechanisms on affected Samsung devices.

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Compliance Impact

This vulnerability allows local attackers to execute arbitrary code with root privileges, which could lead to unauthorized access to sensitive data. This may impact compliance with standards like GDPR and HIPAA by potentially exposing personal or health information.

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Mitigation Strategies

Apply the SMR Sep-2026 Release 1 or later updates to address the DualDAR use-after-free vulnerability. Ensure Samsung devices are updated to the latest security patch.

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