Summary
A vulnerability in the kernel-mode layer of the NVIDIA GPU Display Driver for Windows and Linux may expose kernel stack contents, including return addresses and pointers. Under conditions that allow successful exploitation, an attacker could use the disclosure to support code execution, privilege escalation, denial of service, information disclosure, or data tampering.
Affected context
The issue occurs in the kernel-mode component of the NVIDIA GPU Display Driver on supported Windows and Linux systems. Risk depends on access to a vulnerable driver interface and on whether local users or applications can submit inputs that cause kernel stack data to be returned or exposed.
Exploit preconditions
- Attack surface: NVIDIA GPU driver kernel-mode interfaces
- Required access: Local access or application-level ability to interact with the affected driver
- Trigger point: A driver operation that exposes uninitialized or insufficiently sanitized kernel stack contents
- Why exploitation is possible: Returned stack data may contain sensitive addresses or pointers that can disclose kernel state and potentially assist further attacks
Why this happens
The underlying bug is an information exposure condition in kernel-mode driver handling. Data returned from a kernel operation may include residual stack contents instead of only explicitly initialized and authorized values.
This maps to CWE-200: Exposure of Sensitive Information to an Unauthorized Actor, because kernel addresses and pointers can be disclosed to an untrusted caller. Such disclosures may weaken memory-protection mechanisms and make other attacks easier, although the disclosure alone does not necessarily guarantee code execution.
Potential impact
- An attacker may disclose kernel stack contents, addresses, or pointers
- The exposed information could assist further kernel exploitation
- Successful exploitation could lead to privilege escalation or code execution
- Affected systems could experience denial of service
- An attacker could potentially disclose information or tamper with data
General mitigation guidance
Mitigation generally focuses on ensuring that kernel-mode interfaces never return unintended memory contents and that driver operations enforce strict trust boundaries.
Common defensive patterns include:
- Explicitly initialize output buffers and structures before returning data
- Return only fields that are required by the caller
- Validate lengths, offsets, and structure versions at every driver boundary
- Apply least privilege to local users, services, and applications interacting with GPU devices
- Isolate high-risk workloads and restrict unnecessary access to device interfaces
- Use secure-by-default driver configuration and deployment policies
How teams detect issues like this
Detection and prevention efforts can include:
- Static analysis for uninitialized kernel memory, incomplete structure initialization, and unchecked output lengths
- Code review of IOCTL handlers, buffer-copy operations, and user-kernel data exchanges
- Runtime testing that checks whether returned buffers contain residual kernel data
- Policy enforcement limiting which users and services may access GPU device interfaces
- Monitoring for unusual driver interaction patterns, repeated malformed requests, or application crashes
- Automated security review tools that identify potential memory disclosure paths
