CVE-2026-25261 in Snapdragon Compute
Summary
by MITRE • 09/17/2026
Memory corruption while processing rear sensor IOCTL calls.
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Analysis
by VulDB Data Team • 09/17/2026
The vulnerability described involves a critical memory corruption flaw occurring within the kernel-space handling of input/output control (IOCTL) requests directed at the rear camera sensor subsystem. In modern operating systems, particularly mobile platforms like Android or embedded Linux environments, hardware components such as image sensors are accessed through specialized driver interfaces that expose IOCTL endpoints to user-space applications. These endpoints allow applications to configure sensor parameters, trigger captures, and manage streaming states. The flaw resides in the validation logic of these specific rear-sensor-related IOCTL calls, where insufficient boundary checks or improper handling of input data structures lead to unsafe memory operations. This type of defect is characteristic of CWE-120 Buffer Overflow or CWE-787 Out-of-bounds Write vulnerabilities, depending on whether the corruption involves overwriting adjacent stack/heap memory or writing beyond allocated array bounds respectively.
The technical mechanism typically exploits a lack of rigorous sanitization of parameters passed from user space to kernel space via the IOCTL interface. When an application sends a request containing malformed length fields, invalid pointers, or out-of-range configuration values, the driver fails to validate these inputs against expected constraints before processing them. Consequently, the kernel may attempt to write data to memory locations outside the intended buffer boundaries or execute operations on uninitialized memory regions. This can result in heap corruption, stack smashing, or arbitrary code execution if an attacker can control the overwritten memory contents. The severity is heightened by the fact that camera drivers often run with high privileges and have direct access to physical memory mappings for frame buffers, making successful exploitation potentially lead to full system compromise rather than just a local denial of service.
From an operational perspective, this vulnerability poses significant risks to both device integrity and user privacy. An attacker who can trigger these IOCTL calls—often through malicious applications or compromised legitimate apps with camera permissions—can crash the kernel, leading to a complete system reboot or freeze, which constitutes a Denial of Service (DoS). More critically, if memory corruption allows for arbitrary read/write primitives, it enables privilege escalation from unprivileged user space to root-level access. This aligns with MITRE ATT&CK techniques such as T1055 Process Injection or T1068 Exploitation for Privilege Escalation, where the attacker leverages the vulnerability to inject malicious code into privileged processes or directly execute shellcode within kernel memory. The impact extends beyond immediate system instability; it undermines the trust model of the operating system by allowing unauthorized access to sensitive data stored in adjacent memory regions, potentially exposing cryptographic keys, user credentials, or other protected information.
Mitigation strategies must focus on hardening the IOCTL handling logic and enforcing strict input validation at multiple layers. Developers should implement comprehensive bounds checking for all parameters received via IOCTL calls, ensuring that lengths do not exceed allocated buffer sizes and that pointers are verified using safe access functions like copy_from_user with proper error handling. Additionally, enabling kernel memory protection features such as Kernel Address Space Layout Randomization (KASLR), Stack Canaries, and Full Relocation Read-Only (FRR) can mitigate the exploitation of memory corruption by making it harder for attackers to predict target addresses or bypass security checks. Regular code audits focusing on driver-level input validation are essential, alongside adopting static analysis tools that detect potential buffer overflows during development. For end-users, keeping device firmware and operating system patches up-to-date is crucial, as vendors typically release updates addressing these low-level kernel flaws once they are identified in the supply chain or through internal security reviews.