CVE-2026-65083 in OpenShell
Summary
by MITRE • 08/25/2026
NVIDIA OpenShell for Linux contains a vulnerability in its sandbox provisioning API, where an attacker could cause an incomplete list of disallowed inputs. A successful exploit of this vulnerability might lead to code execution, escalation of privileges, information disclosure, data tampering, and denial of service.
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Analysis
by VulDB Data Team • 08/25/2026
The NVIDIA OpenShell for Linux environment serves as a critical infrastructure component within high-performance computing clusters and AI development pipelines, providing users with isolated shell environments that leverage GPU resources while maintaining system integrity through sandboxing mechanisms. The vulnerability identified in the sandbox provisioning API represents a fundamental flaw in how input validation is enforced during the initialization of these restricted execution contexts. Specifically, the application fails to maintain an exhaustive or correctly updated list of disallowed inputs when configuring the sandbox parameters. This oversight allows for the inclusion of potentially malicious or malformed arguments that bypass intended security controls, effectively weakening the isolation boundaries designed to prevent lateral movement and unauthorized access within the cluster architecture.
From a technical perspective, this flaw aligns with CWE-20 Improper Input Validation, as the system does not adequately sanitize or verify all user-supplied data before processing it for sandbox configuration. The incomplete list of disallowed inputs suggests that certain edge cases or specific character sequences are not explicitly blocked by the whitelist or blacklist mechanisms implemented in the provisioning logic. When an attacker exploits this gap, they can inject commands or configurations that interact with underlying system binaries or environment variables outside the intended scope of the sandbox. This lack of strict input filtering creates a pathway for arbitrary code execution if the provisioned shell inherits elevated privileges or accesses sensitive configuration files that were not properly restricted during setup.
The operational impact of this vulnerability is severe due to its potential to facilitate privilege escalation and lateral movement within enterprise environments. A successful exploit could allow an unprivileged user to escape their designated sandbox, thereby gaining access to host-level resources or other users' data. This leads directly to information disclosure, where sensitive intellectual property, credentials stored in environment variables, or proprietary model weights might be exfiltrated. Furthermore, the ability to tamper with data within these shared computing environments undermines the integrity of machine learning workflows and scientific computations. In worst-case scenarios, an attacker could disrupt services by consuming excessive resources or crashing critical components, resulting in a denial of service that affects multiple tenants sharing the same physical hardware infrastructure.
This vulnerability also maps closely to MITRE ATT&CK techniques related to privilege escalation and defense evasion, particularly those involving container escape or sandbox breakout tactics. Attackers can leverage this flaw to bypass security monitoring tools that rely on standard process isolation metrics, as the exploit occurs during the provisioning phase before full runtime restrictions are applied. The ability to execute code with higher privileges than intended poses a significant risk in multi-tenant cloud and HPC environments where trust boundaries between users must be strictly enforced. Without proper remediation, this weakness could serve as an initial foothold for more sophisticated attacks targeting the broader network infrastructure connected to these GPU clusters.
To mitigate this risk, NVIDIA has released updated versions of OpenShell that address the input validation logic within the sandbox provisioning API. Administrators should immediately apply the latest patches and ensure that all nodes in their computing fabric are running the corrected software version. In addition to patching, organizations should implement strict network segmentation policies to limit access to the management interfaces responsible for sandbox provisioning. It is also advisable to enforce principle of least privilege by ensuring that user accounts interacting with OpenShell have minimal permissions necessary for their tasks. Regular auditing of provisioned environments and monitoring for anomalous process creation or resource usage patterns can further enhance detection capabilities against potential exploitation attempts before significant damage occurs.