Out-of-bounds Write Vulnerability in Samsung Mobile Software
CVE-2026-21087

8.6HIGH

Key Information:

Vendor

Samsung
Status
Samsung Devices
Vendor
CVE Published:
9 September 2026

What is CVE-2026-21087?

The vulnerability in libmdnie.so prior to SMR Sep-2026 Release 1 could be exploited by local attackers to perform out-of-bounds write operations. This allows unauthorized execution of arbitrary code with system server privileges, potentially leading to compromised system integrity. Users are advised to update their devices to secure versions as soon as possible.

Affected Version(s)

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

References

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

CVSS V4

Score:
8.6
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

.