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
CVE-2026-21046 is a TOCTOU race condition vulnerability in the fabricKeymaster trustlet of Samsung Mobile Devices before the SMR Jul-2026 Release 1. The race condition can be exploited by local attackers with elevated privileges to execute arbitrary code. The vulnerability has a CVSS 4.0 base score of 8.4, indicating high impact with local attack vector, low attack complexity, no user interaction, and high impacts on confidentiality, integrity, and availability. No official remediation or patch details are currently available.
Potential Impact
Successful exploitation allows a local privileged attacker to execute arbitrary code within the fabricKeymaster trustlet, potentially compromising device security and trust components. This can lead to unauthorized actions and compromise of sensitive operations handled by the trustlet.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or mitigation is currently documented, users should monitor Samsung Mobile advisories for updates and apply the SMR Jul-2026 Release 1 or later once available.
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
CVE-2026-21046 is a TOCTOU race condition vulnerability in the fabricKeymaster trustlet of Samsung Mobile Devices before the SMR Jul-2026 Release 1. The race condition can be exploited by local attackers with elevated privileges to execute arbitrary code. The vulnerability has a CVSS 4.0 base score of 8.4, indicating high impact with local attack vector, low attack complexity, no user interaction, and high impacts on confidentiality, integrity, and availability. No official remediation or patch details are currently available.
Potential Impact
Successful exploitation allows a local privileged attacker to execute arbitrary code within the fabricKeymaster trustlet, potentially compromising device security and trust components. This can lead to unauthorized actions and compromise of sensitive operations handled by the trustlet.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or mitigation is currently documented, users should monitor Samsung Mobile advisories for updates and apply the SMR Jul-2026 Release 1 or later once available.
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: 07/10/2026, 05:32:36 UTC
Last updated: 07/10/2026, 08:11:11 UTC
Views: 8
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