CVE-2022-20599 in Android
Summary
by MITRE • 12/16/2022
In Pixel firmware, there is a possible exposure of sensitive memory due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-242332706References: N/A
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Analysis
by VulDB Data Team • 04/22/2026
The vulnerability identified as CVE-2022-20599 represents a critical memory safety issue within the Android kernel firmware of pixel devices. This flaw manifests as a missing bounds check in the kernel's memory management operations, creating a potential pathway for unauthorized privilege escalation. The vulnerability specifically affects the pixel hardware platform's firmware implementation, where insufficient input validation allows for memory access violations that could be exploited by malicious actors. The issue stems from inadequate boundary verification mechanisms within kernel-level memory operations, which are fundamental to maintaining system security boundaries and preventing unauthorized data access.
The technical nature of this vulnerability places it squarely within the category of memory corruption flaws, specifically aligning with CWE-129 which addresses insufficient bounds checking. The missing bounds check creates a condition where kernel memory regions can be accessed beyond their intended boundaries, potentially exposing sensitive kernel data structures, credentials, or system resources. This type of vulnerability typically occurs when kernel modules fail to validate the size or range of memory accesses, allowing attackers to read or write beyond allocated memory regions. The exploitation requires System execution privileges as a baseline, indicating that the vulnerability would need to be triggered through existing system-level access or a pre-existing compromise to reach the privilege escalation stage.
The operational impact of CVE-2022-20599 extends beyond simple information disclosure, as it enables local privilege escalation from standard user contexts to system-level privileges. This escalation capability represents a significant security risk because it allows attackers who have already gained some level of system access to elevate their privileges to full system control. The vulnerability's exploitation does not require user interaction, making it particularly dangerous as it can be triggered automatically through system processes or malicious code execution. This characteristic aligns with ATT&CK technique T1068 which covers 'Local Privilege Escalation' and represents a critical weakness in the kernel's security model that could be leveraged for persistent system compromise.
Mitigation strategies for this vulnerability must focus on both immediate patching and defensive measures within the kernel framework. The primary remediation involves implementing proper bounds checking mechanisms throughout the kernel memory management subsystem, ensuring that all memory access operations validate their boundaries before execution. System administrators should prioritize applying the latest firmware updates from Google and Android security patches that address this specific memory corruption issue. Additionally, implementing kernel memory protection features such as stack canaries, memory randomization, and kernel address space layout randomization can provide additional defense-in-depth measures. The vulnerability also highlights the importance of comprehensive kernel code review processes and static analysis tools that can identify similar missing bounds check scenarios across the entire kernel codebase, as similar issues may exist in other memory handling functions that have not yet been discovered or patched.