CVE-2025-36903 in Android
Summary
by MITRE • 09/04/2025
In lwis_io_buffer_write, there is a possible OOB read/write due to improper input validation. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 09/04/2025
The vulnerability identified as CVE-2025-36903 resides within the lwis_io_buffer_write function, representing a critical security flaw that enables out-of-bounds read and write operations through inadequate input validation mechanisms. This issue manifests in the lwis_io_buffer_write component which handles input/output buffer operations, creating a pathway for malicious actors to exploit memory access violations that bypass normal security boundaries. The vulnerability operates at a fundamental level within the system's buffer management architecture, where insufficient bounds checking allows attackers to access memory locations beyond the intended buffer boundaries.
The technical implementation of this flaw stems from improper validation of input parameters passed to the lwis_io_buffer_write function, creating opportunities for attackers to manipulate buffer indices and offsets. This vulnerability maps directly to CWE-129, which describes improper validation of array indices, and CWE-787, which addresses out-of-bounds write conditions. The absence of proper input sanitization means that malicious data can traverse the buffer boundaries without restriction, potentially corrupting adjacent memory regions or reading sensitive data from unauthorized locations. The flaw operates without requiring any user interaction, making it particularly dangerous as it can be exploited automatically by malicious processes or code running with existing privileges.
The operational impact of this vulnerability extends to local privilege escalation scenarios where an attacker with minimal system access can elevate their privileges to gain administrative or root-level access. This occurs because the out-of-bounds memory operations can be leveraged to overwrite critical system structures, modify function pointers, or corrupt memory layouts that govern privilege levels within the operating system. The exploitability of this vulnerability does not require additional execution privileges, meaning that even unprivileged users or processes can potentially leverage this flaw to achieve higher privilege levels. This characteristic aligns with ATT&CK technique T1068, which covers the use of privilege escalation techniques, and specifically demonstrates how memory corruption vulnerabilities can be weaponized for system compromise.
Mitigation strategies for CVE-2025-36903 should focus on implementing comprehensive input validation mechanisms within the lwis_io_buffer_write function, including bounds checking and parameter validation before any buffer operations occur. System administrators should prioritize applying vendor patches or updates that address this specific memory handling flaw, while also implementing additional security controls such as address space layout randomization and stack canaries to reduce exploitability. The vulnerability requires immediate attention due to its potential for local privilege escalation, and organizations should conduct thorough vulnerability assessments to identify systems running affected software versions. Regular security monitoring and intrusion detection systems should be configured to detect anomalous buffer access patterns that might indicate exploitation attempts, while also ensuring that the underlying system components are regularly updated to prevent similar memory corruption vulnerabilities from being exploited in the future.