In the Linux kernel, a vulnerability has been resolved that affects the net_device lifecycle with device_move. This issue arises during the function instance creation and binding phases, leading to dangling sysfs symlinks when the parent device is destroyed while the net_device survives. The potential impact of this vulnerability includes improper sysfs topology and power management ordering.
Risk to organizations includes the possibility of systems encountering errors related to network device management, which may affect performance and stability. Although the severity is classified as low, it demands attention due to its implications for system reliability.
At this time, there is no known exploit, and the vulnerability is awaiting analysis. Organizations should monitor updates related to this CVE to ensure they are prepared to address it effectively.
Organizations should prioritize patching immediately.
Vulnerability Details
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_eem: Fix net_device lifecycle with device_move. The net_device is allocated during function instance creation and registered during the bind phase with the gadget device as its sysfs parent. When the function unbinds, the parent device is destroyed, but the net_device survives, resulting in dangling sysfs symlinks.
To maintain compatibility with legacy composite drivers (e.g., multi.c), the bound flag is used to indicate whether the network device is shared and pre-registered during the legacy driver's bind phase.
Technical Analysis
The root cause of this vulnerability is related to the improper handling of the net_device lifecycle during the bind and unbind processes in the Linux kernel. The attack vector is classified as local, as it requires access to the system to exploit.
The attack complexity is low, and no user interaction is required. The vulnerability has a low confidentiality impact, integrity impact, and availability impact.
Risk & Impact Analysis
Despite the low severity of this vulnerability, organizations must assess their deployment risk. The potential for dangling sysfs symlinks could lead to unexpected system behavior, particularly in environments that depend heavily on network device functionality.
Organizations should address this vulnerability in their priority patch cycle, even though it is classified as low severity, to ensure their systems remain stable and secure.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch.
Mitigation & Remediation
Organizations should apply the latest patches provided by the Linux kernel maintainers. If patches are not available, consider implementing configuration hardening and monitoring network devices closely for unusual behavior.
For more information on penetration testing, organizations should refer to penetration testing services that can help assess the security posture.
Detection Guidance
Monitor logs for indicators of device lifecycle management errors and any anomalies in sysfs that may indicate problems with network device bindings.
AppSecure Threat Intelligence Insight
This vulnerability highlights the importance of proper management of device lifecycles in kernel development. Security teams should ensure that their systems are updated regularly and that they are familiar with potential impacts of system changes.
For further reading, organizations can explore penetration testing methodology and vulnerability management program design to enhance their security practices.
Organizations should consider reviewing their network security strategies and implement measures that can address potential risks, ensuring that they remain resilient against future vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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