CVE-2026-21046: CWE-367 Time-of-check time-of-use (TOCTOU) race condition in Samsung Mobile Samsung Mobile Devices
Time-of-check time-of-use race condition in fabricKeymaster trustlet prior to SMR Jul-2026 Release 1 allows local privileged attackers to execute arbitrary code.
AI Analysis
Technical Summary
This vulnerability involves a TOCTOU race condition in the fabricKeymaster trustlet on Samsung Mobile Devices before the SMR Jul-2026 Release 1. Exploitation requires local privileged access and can lead to arbitrary code execution. The CVSS 4.0 base score is 8.4, indicating high severity. No official patch or remediation guidance has been published yet, and no known exploits are reported in the wild.
Potential Impact
Successful exploitation allows a local privileged attacker to execute arbitrary code on affected Samsung Mobile Devices, potentially compromising device security and trustlet integrity. The vulnerability affects the fabricKeymaster trustlet component, which is critical for secure key management.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, limit local privileged access to trusted users only and monitor for updates from Samsung Mobile regarding patches or mitigations.
CVE-2026-21046: CWE-367 Time-of-check time-of-use (TOCTOU) race condition in Samsung Mobile Samsung Mobile Devices
Description
Time-of-check time-of-use race condition in fabricKeymaster trustlet prior to SMR Jul-2026 Release 1 allows local privileged attackers to execute arbitrary code.
CVSS v4.0
Score 8.4high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a TOCTOU race condition in the fabricKeymaster trustlet on Samsung Mobile Devices before the SMR Jul-2026 Release 1. Exploitation requires local privileged access and can lead to arbitrary code execution. The CVSS 4.0 base score is 8.4, indicating high severity. No official patch or remediation guidance has been published yet, and no known exploits are reported in the wild.
Potential Impact
Successful exploitation allows a local privileged attacker to execute arbitrary code on affected Samsung Mobile Devices, potentially compromising device security and trustlet integrity. The vulnerability affects the fabricKeymaster trustlet component, which is critical for secure key management.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, limit local privileged access to trusted users only and monitor for updates from Samsung Mobile regarding patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- SamsungMobile
- Date Reserved
- 2025-12-11T01:33:35.816Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a50809568715ace43063775
Added to database: 07/10/2026, 05:18:13 UTC
Last enriched: 07/17/2026, 09:41:37 UTC
Last updated: 08/23/2026, 22:52:09 UTC
Views: 120
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