CVE-2025-20882
Published: 04 February 2025
Summary
CVE-2025-20882 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Samsung Android. Its CVSS base score is 7.0 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 19.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-16 (Memory Protection) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Implements memory protection mechanisms like address space randomization, stack guards, and non-executable memory to directly prevent out-of-bounds writes and arbitrary code execution from uninitialized memory access.
Requires timely flaw remediation through patching, such as applying Samsung's SMR Jan-2025 Release 1, to eliminate the specific out-of-bounds write vulnerability in libsthmbc.so.
Enforces least privilege on the svc1td process to restrict the scope and impact of privilege escalation from successful arbitrary code execution.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Out-of-bounds write enabling local arbitrary code execution with elevated privileges directly matches Exploitation for Privilege Escalation.
NVD Description
Out-of-bounds write in accessing uninitialized memory for svc1td in libsthmbc.so prior to SMR Jan-2025 Release 1 allows local attackers to execute arbitrary code with privilege. User interaction is required for triggering this vulnerability.
Deeper analysisAI
CVE-2025-20882 is an out-of-bounds write vulnerability (CWE-787) in the svc1td component of libsthmbc.so, affecting Samsung devices prior to the SMR Jan-2025 Release 1. The flaw occurs when accessing uninitialized memory, which can be exploited to execute arbitrary code with elevated privileges. It carries a CVSS v3.1 base score of 7.0 (AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H), indicating high confidentiality, integrity, and availability impacts.
Local attackers with no privileges can exploit this vulnerability, but it requires user interaction to trigger and involves high attack complexity. Successful exploitation allows arbitrary code execution with privileges, potentially leading to full device compromise if the attacker gains persistent local access.
Samsung's security advisory for the January 2025 monthly release details the patch in SMR Jan-2025 Release 1, recommending that users apply the update to mitigate the issue.
Details
- CWE(s)