CVE-2026-0123 in Android
Summary
by MITRE • 03/11/2026
In EfwApTransport::ProcessRxRing of efw_ap_transport.cc, there is a possible out of bounds write due to a missing bounds check. 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 • 03/16/2026
The vulnerability identified as CVE-2026-0123 resides within the EfwApTransport::ProcessRxRing function in the efw_ap_transport.cc source file, representing a critical security flaw that enables local privilege escalation without requiring additional execution privileges or user interaction. This issue manifests as a potential out of bounds write condition that stems from the absence of proper bounds checking mechanisms within the network transport layer implementation.
The technical flaw occurs when processing received network packets through the Rx ring buffer mechanism, where the application fails to validate the boundaries of data being written to memory locations. This missing validation allows malicious local processes to manipulate input data in such a way that memory corruption occurs beyond intended buffer limits. The vulnerability specifically affects the wireless access point transport layer implementation, suggesting it operates within a network infrastructure context where privileged operations are performed.
From an operational impact perspective, this vulnerability creates a significant risk for local privilege escalation attacks, as it allows an attacker with minimal privileges to potentially elevate their access level to system-level privileges. The absence of user interaction requirements makes this vulnerability particularly dangerous, as it can be exploited automatically without any human intervention. The flaw essentially provides a pathway for local adversaries to gain elevated privileges through memory corruption techniques that could potentially lead to full system compromise.
The vulnerability maps to CWE-129, which specifically addresses "Improper Validation of Array Index," and represents a classic case of insufficient bounds checking in memory operations. This aligns with ATT&CK technique T1068, which covers "Exploitation for Privilege Escalation" and demonstrates how memory corruption flaws can be leveraged for unauthorized access. The implementation of proper bounds checking would require validation of all array indices and buffer boundaries before memory operations, ensuring that data writes remain within allocated memory regions.
Mitigation strategies should focus on implementing comprehensive bounds checking throughout the network transport layer, particularly in functions that process received data packets. The fix requires adding proper validation mechanisms to verify that all memory operations remain within allocated buffer boundaries before any write operations occur. Additionally, code reviews should be conducted to identify similar patterns in other transport layer functions, as this type of vulnerability often appears in multiple locations within complex network implementations. System administrators should also consider implementing additional security controls such as address space layout randomization and stack canaries to further reduce the exploitability of such memory corruption vulnerabilities.