Keymaster Trustlet OOB Write (CVE-2026-21085) Samsung Android
CVE-2026-21085 Published on September 9, 2026
Out-of-bounds write in Keymaster trustlet prior to SMR Sep-2026 Release 1 allows local privileged attackers to write out-of-bounds memory.
Vulnerability Analysis
CVE-2026-21085 can be exploited with local system access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2026-21085 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2026-21085
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Affected Versions
Samsung Mobile Devices:- Version SMR Sep-2026 Release in Android 14, 15, 16, 17 and below * is unaffected.