Out-of-bounds Write Vulnerability in Keymaster Trustlet by Samsung
CVE-2026-21085

8.4HIGH

Key Information:

Vendor

Samsung
Status
Samsung Devices
Vendor
CVE Published:
9 September 2026

What is CVE-2026-21085?

The vulnerability involves an out-of-bounds write in the Keymaster trustlet, which can be exploited by local privileged attackers. This flaw permits these attackers to write to memory locations outside the designated boundaries, potentially impacting system integrity and security. Users are advised to update their software to the SMR Sep-2026 Release 1 to mitigate risks associated with this vulnerability.

Affected Version(s)

Samsung Mobile Devices SMR Sep-2026 Release in Android 14, 15, 16, 17

References

https://security.samsungmobile.com/securityUpdate.smsb?ye...

CVSS V4

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.