CVE-2025-43935 Overview
Dell PowerScale OneFS contains an improper resource shutdown or release vulnerability (CWE-404) that affects versions prior to 9.12.0.0. This vulnerability allows a high-privileged attacker with local access to potentially exploit improper resource handling mechanisms, leading to denial of service conditions on affected systems.
Critical Impact
A privileged local attacker can trigger denial of service by exploiting improper resource shutdown or release handling in Dell PowerScale OneFS systems.
Affected Products
- Dell PowerScale OneFS versions prior to 9.12.0.0
Discovery Timeline
- 2026-04-16 - CVE CVE-2025-43935 published to NVD
- 2026-04-16 - Last updated in NVD database
Technical Details for CVE-2025-43935
Vulnerability Analysis
This vulnerability stems from improper resource shutdown or release handling within Dell PowerScale OneFS. The flaw is classified under CWE-404 (Improper Resource Shutdown or Release), which occurs when a system fails to properly release resources such as file handles, memory allocations, or system objects after they are no longer needed.
In the context of Dell PowerScale OneFS, this vulnerability requires local access and high privileges to exploit. While the barrier to entry is significant due to the privilege requirements, successful exploitation can result in a complete loss of availability for the affected storage system. The vulnerability does not impact confidentiality or integrity of data, but the denial of service condition can disrupt critical storage operations in enterprise environments.
Root Cause
The root cause lies in improper resource shutdown or release mechanisms within Dell PowerScale OneFS. When certain operations are performed by a privileged user, system resources may not be properly deallocated or released, leading to resource exhaustion. This improper resource management can accumulate over time or be triggered deliberately by an attacker with sufficient privileges, ultimately causing the system to become unavailable.
Attack Vector
The attack requires local access to the Dell PowerScale OneFS system and high-level privileges. An attacker would need to:
- Gain local access to the affected PowerScale OneFS system
- Possess or elevate to high-privileged account access
- Trigger specific operations that exploit the improper resource release handling
- Cause resource exhaustion or system instability leading to denial of service
The vulnerability cannot be exploited remotely, which limits its exposure. However, in environments where administrative access is shared or where insider threats exist, this vulnerability poses a significant risk to storage infrastructure availability. For detailed technical information, refer to the Dell Security Update DSA-2025-347.
Detection Methods for CVE-2025-43935
Indicators of Compromise
- Unexpected system resource exhaustion on PowerScale OneFS nodes
- Unusual privileged user activity accessing resource-intensive operations
- System performance degradation followed by service unavailability
- Abnormal process termination or resource allocation patterns in system logs
Detection Strategies
- Monitor system resource utilization metrics on PowerScale OneFS clusters for anomalous patterns
- Implement audit logging for privileged user actions on OneFS systems
- Configure alerts for resource exhaustion conditions or service disruptions
- Review authentication logs for unusual local access patterns by high-privileged accounts
Monitoring Recommendations
- Enable comprehensive logging on Dell PowerScale OneFS systems to capture resource allocation events
- Deploy SentinelOne agents to monitor endpoint behavior and detect denial of service patterns
- Establish baseline resource utilization metrics and alert on significant deviations
- Regularly review privileged account access and activity on storage infrastructure
How to Mitigate CVE-2025-43935
Immediate Actions Required
- Upgrade Dell PowerScale OneFS to version 9.12.0.0 or later immediately
- Audit and restrict local access privileges on affected PowerScale systems
- Review and limit the number of accounts with high-privilege access
- Implement network segmentation to restrict local access vectors to storage infrastructure
Patch Information
Dell has released a security update to address this vulnerability. Organizations should upgrade to Dell PowerScale OneFS version 9.12.0.0 or later. The patch details and additional security updates are documented in Dell Security Update DSA-2025-347.
Workarounds
- Restrict local access to PowerScale OneFS systems to essential personnel only
- Implement strict privilege management and regularly audit high-privileged accounts
- Monitor system resource utilization and configure alerts for abnormal consumption patterns
- Consider implementing additional access controls and network segmentation until patching is complete
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
