CVE-2025-65889 Overview
A type validation flaw exists in the flow.dstack() component of OneFlow v0.9.0. This vulnerability allows remote attackers to cause a Denial of Service (DoS) condition by supplying specially crafted input to the affected function. The flaw stems from improper input validation (CWE-400: Uncontrolled Resource Consumption), which can lead to service disruption when malicious data is processed.
Critical Impact
Remote attackers can exploit this type validation vulnerability to crash OneFlow instances, causing service unavailability for machine learning and deep learning workloads without requiring authentication.
Affected Products
- OneFlow v0.9.0
- OneFlow installations using the flow.dstack() component
Discovery Timeline
- 2026-01-28 - CVE CVE-2025-65889 published to NVD
- 2026-01-29 - Last updated in NVD database
Technical Details for CVE-2025-65889
Vulnerability Analysis
This vulnerability is classified as a type validation flaw affecting the flow.dstack() function in OneFlow, a popular open-source deep learning framework. The vulnerability enables network-based attacks that can be executed without authentication or user interaction, making it relatively easy for attackers to exploit.
The vulnerability falls under CWE-400 (Uncontrolled Resource Consumption), indicating that the flaw allows attackers to consume excessive system resources through malformed inputs. When exploited, the application fails to properly validate input types before processing, leading to unexpected behavior and ultimately a denial of service condition.
Root Cause
The root cause lies in insufficient type validation within the flow.dstack() component. The function does not adequately verify that input parameters conform to expected data types before processing. This allows attackers to pass crafted inputs that trigger uncontrolled resource consumption or crash the application. The lack of proper boundary checking and type enforcement creates the opportunity for exploitation.
Attack Vector
The attack can be conducted remotely over the network. An attacker can send specially crafted input to an application or service utilizing the vulnerable flow.dstack() function. The attack does not require any privileges or user interaction, making it straightforward to execute against exposed OneFlow instances.
The exploitation involves:
- Identifying an exposed OneFlow instance running version 0.9.0
- Crafting malicious input that violates the expected type constraints of flow.dstack()
- Submitting the malformed data to trigger the type validation flaw
- The target service experiences a denial of service condition
Technical details and proof-of-concept information can be found in the OneFlow GitHub Issue #10663.
Detection Methods for CVE-2025-65889
Indicators of Compromise
- Unexpected crashes or restarts of OneFlow-based services
- Error logs indicating type validation failures in flow.dstack() operations
- Abnormal resource consumption patterns in applications using OneFlow
- Service unavailability correlated with incoming network requests
Detection Strategies
- Monitor application logs for exceptions or errors related to the flow.dstack() function
- Implement anomaly detection for unusual input patterns to OneFlow-based applications
- Deploy network intrusion detection signatures to identify malformed requests targeting machine learning services
- Configure alerting for service crashes or unexpected restarts of OneFlow instances
Monitoring Recommendations
- Enable verbose logging for OneFlow operations to capture detailed error information
- Implement health checks and service availability monitoring for applications using OneFlow
- Monitor system resource utilization (CPU, memory) for anomalous spikes that may indicate exploitation attempts
- Review network traffic patterns to identify potential attack sources targeting your OneFlow deployments
How to Mitigate CVE-2025-65889
Immediate Actions Required
- Audit your environment to identify all instances of OneFlow v0.9.0
- Implement input validation at the application layer before data reaches flow.dstack() calls
- Consider deploying network-level filtering to restrict access to OneFlow-based services
- Monitor for official patches or updates from the OneFlow development team
Patch Information
At the time of this writing, organizations should monitor the OneFlow GitHub Repository for official security patches addressing this vulnerability. The issue has been documented in GitHub Issue #10663, which may contain additional remediation guidance.
Workarounds
- Implement strict input validation and type checking at the application level before passing data to flow.dstack()
- Restrict network access to OneFlow-based services to trusted IP addresses only
- Deploy a web application firewall (WAF) or reverse proxy to filter potentially malicious inputs
- Consider containerizing OneFlow instances with resource limits to contain the impact of DoS attacks
# Example: Restricting network access to OneFlow services using iptables
# Allow only trusted networks to access your OneFlow application port
iptables -A INPUT -p tcp --dport 8080 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 8080 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
