Out-of-bounds write in Keymaster trustlet prior to SMR Sep-2026 Release 1 allows local privileged attackers to write out-of-bounds memory.

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact total

Affected Vendors & Products

No data.

No data.

No data.

References
Link Providers
https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=09 cve-icon cve-icon
History

Thu, 10 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 09 Sep 2026 11:45:00 +0000

Type Values Removed Values Added
Title Out‑of‑Bounds Write in Samsung Keymaster Trustlet Enables Local Privilege Escalation
Weaknesses CWE-787

Wed, 09 Sep 2026 05:00:00 +0000

Type Values Removed Values Added
Description Out-of-bounds write in Keymaster trustlet prior to SMR Sep-2026 Release 1 allows local privileged attackers to write out-of-bounds memory.
References
Metrics cvssV4_0

{'score': 8.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: SamsungMobile

Published: 2026-09-09T04:47:32.562Z

Updated: 2026-09-10T14:25:06.188Z

Reserved: 2025-12-11T01:33:35.826Z

Link: CVE-2026-21085

cve-icon Vulnrichment

Updated: 2026-09-10T14:24:53.683Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-09T05:17:20.473

Modified: 2026-09-10T15:17:25.577

Link: CVE-2026-21085

cve-icon Redhat

No data.