CVE-2026-21042
Samsung · Mobile Devices
An out-of-bounds write vulnerability exists in the libsavsac library within Samsung mobile devices, potentially allowing unauthorized memory modification.
Executive summary
A high-severity out-of-bounds write vulnerability in Samsung mobile devices could allow a local attacker to execute unauthorized code or disrupt system stability.
Vulnerability
This vulnerability is an out-of-bounds write (CWE-787) occurring within the libsavsac component. The attack requires a local, authenticated attacker with low privileges to trigger the memory corruption.
Business impact
With a CVSS score of 8.4, this vulnerability represents a significant risk to device integrity. Successful exploitation could lead to privilege escalation or system instability, potentially compromising sensitive user data stored on the mobile device and undermining the security posture of the enterprise mobile fleet.
Remediation
Immediate Action: Update all affected Samsung mobile devices to the SMR Jul-2026 release or later, which includes the necessary patches for Android 14, 15, and 16.
Proactive Monitoring: Security teams should monitor device logs for unexpected process crashes or anomalous behavior originating from the libsavsac component.
Compensating Controls: Ensure that mobile device management (MDM) policies restrict unauthorized applications from running and maintain strict control over local user permissions.
Exploitation status
Public Exploit Available: False
Analyst recommendation
The severity of this memory corruption vulnerability necessitates immediate attention. IT administrators must prioritize the deployment of the SMR Jul-2026 security update across all managed Samsung devices to mitigate the risk of local privilege escalation.