Stack-based Buffer Overflow in Samsung Mobile's libril_sem.so
CVE-2026-21068

8.4HIGH

Key Information:

Vendor

Samsung
Status
Samsung Devices
Vendor
CVE Published:
10 August 2026

What is CVE-2026-21068?

A stack-based buffer overflow vulnerability exists in the libril_sem.so component of Samsung Mobile devices prior to the SMR Aug-2026 Release 1. This flaw allows privileged local attackers to exploit the buffer overflow, potentially leading to the execution of arbitrary code. Users are advised to update their devices to mitigate any associated risks.

Affected Version(s)

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

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

.