In the Linux kernel, the following vulnerability has been resolved: USB: sisusbvga: Add endpoint checks. The syzbot fuzzer was able to provoke a WARNING from the sisusbvga driver, indicating that the driver does not check whether the endpoints it uses are actually present and have the appropriate types. This can lead to unexpected behavior or crashes.
The severity level for this vulnerability is classified as unknown, primarily due to the lack of a CVSS score or detailed impact analysis. However, the exploitation status indicates low exploitability, suggesting that while the vulnerability exists, it is not currently being actively targeted.
Risk to organizations includes potential system stability issues if the vulnerable driver is utilized. Given the deferred status of this vulnerability, organizations should monitor for any future updates or patch releases from the Linux kernel maintainers.
Organizations should prioritize patching immediately if a critical patch is released that addresses this vulnerability, as it might pose risks in specific environments where the sisusbvga driver is in use.
Vulnerability Details
The vulnerability in question is related to the USB subsystem of the Linux kernel, specifically the sisusbvga driver. The warning generated indicates that the USB request block (urb) was improperly formed, raising concerns about the integrity of USB communications.
The official description states that this vulnerability allows for the generation of warnings in the kernel logs, which can indicate deeper issues with driver handling of USB devices. The specific CVE ID is CVE-2023-54213, with a publication date of December 30, 2025.
The details from the publication highlight that the problem arose due to the absence of checks on endpoint presence and type, leading to the potential for instability.
Technical Analysis
The root cause of this vulnerability is the lack of proper endpoint checks in the sisusbvga driver. Attackers may leverage this oversight to generate warnings or potentially exploit the driver under specific circumstances.
The attack vector is categorized as local, as it requires access to the affected system to interact with the vulnerable driver.
The complexity of an attack leveraging this vulnerability is assessed as low. Privileges required to exploit this issue are low, with user interaction not necessary.
This vulnerability impacts confidentiality and integrity, as improper handling of USB communications can lead to data exposure or corruption.
The availability impact is considered low, as the driver does not directly affect the system's operation but may result in system instability.
Risk & Impact Analysis
Real-world deployment risk associated with this vulnerability is relatively low due to its deferred status and the absence of active exploitation. However, organizations using the sisusbvga driver should remain vigilant, particularly in environments reliant on USB communications.
This vulnerability matters to organizations as it may lead to performance degradation or unexpected system behavior, particularly in workloads that rely heavily on USB devices.
The blast radius potential is limited to systems utilizing the affected driver, which may include specialized hardware or configurations.
Given the low EPS score of 0.00036, the urgency for organizations is moderate; monitoring for updates and being prepared to patch when a fix is released is advisable.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch are affected, specifically those utilizing the sisusbvga driver.
Mitigation & Remediation
Patch information will depend on the Linux kernel maintainers. Organizations should monitor for updates and apply patches as they become available.
If patches are not available, organizations may consider disabling the affected driver temporarily until a fix is released.
Configuration hardening and network controls should be evaluated to limit exposure to this vulnerability.
Organizations should validate remediation through penetration testing to identify similar weaknesses.
Detection Guidance
Monitoring logs for warnings related to USB operations can provide an early indicator of potential issues stemming from this vulnerability.
Behavioral anomalies around USB device interactions should be investigated promptly, especially in environments relying on USB communications.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in its representation of the need for thorough endpoint checks within drivers. It emphasizes the importance of robust error handling in system-level software.
This incident serves as a reminder for organizations to conduct regular security assessments of their drivers and firmware to identify and rectify potential flaws.
Security teams should prioritize continuous monitoring and adopt a proactive approach to patch management in response to vulnerabilities like CVE-2023-54213.
For further information on improving security posture, organizations can refer to the following resources: vulnerability management program, penetration testing methodology, and security testing best practices to ensure comprehensive coverage against similar vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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