In the Linux kernel, a vulnerability has been resolved concerning the ksmbd component. Specifically, the issue arose in the function ksmbd_vfs_kern_path_locked. The vulnerability allows for unexpected changes in the path buffer, which could lead to unintended file creation.
The CVSS score for this vulnerability is 5.5, indicating a medium severity level. This score is primarily attributed to the potential for a high impact on availability, while the confidentiality and integrity impacts are negligible.
Risk to organizations includes the potential for system instability and unintended file manipulations. As such, organizations should prioritize patching immediately.
Currently, there are no known exploits or public proof of concept for this vulnerability, but organizations should remain vigilant.
The vulnerability was published on January 21, 2025, and the last modification date was November 3, 2025. Given its medium severity and potential impacts, timely remediation is crucial.
Vulnerability Details
The vulnerability in the Linux kernel is classified under the attack vector of local access, with a low attack complexity and low privileges required. User interaction is not necessary, which heightens the risk for affected systems. The function in question fails to restore the changed path buffer upon encountering an error, which could be exploited if the buffer is utilized as a filename for creation.
The CVSS vector string for this vulnerability is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, clearly indicating the potential availability impact.
No specific CWE classification is provided for this vulnerability.
Technical Analysis
The root cause of this vulnerability lies in the handling of path buffers in the ksmbd component of the Linux kernel. When an error is encountered, the function exits without restoring the previously modified buffer, leading to potential file creation issues.
The attack vector is local, meaning an attacker would need to have local access to exploit this vulnerability. The attack complexity is low, and only low privileges are required, making it easier for attackers to leverage this vulnerability.
No user interaction is required, and the impacts on confidentiality and integrity are minimal, while the availability impact is classified as high.
Risk & Impact Analysis
Organizations running affected versions of the Linux kernel may face risks associated with system availability due to unexpected file manipulations. The potential for high availability impact raises concerns, particularly in environments where uptime is critical.
This vulnerability represents a significant risk as it can lead to unintended consequences if exploited, which may adversely affect organizational operations.
Organizations should address this vulnerability in their priority patch cycle to mitigate the associated risks.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Affected versions of the Linux kernel are those from 6.1.113 to 6.1.124, from 6.6.54 to 6.6.71, from 6.10.13 to 6.10.x, and from 6.11.2 to 6.12.9. Additionally, the release candidates from 6.13 (rc1 to rc6) are also vulnerable.
Mitigation & Remediation
Organizations are urged to apply the available patches to remediate this vulnerability. For detailed patch information, refer to the official Linux kernel repositories.
In scenarios where immediate patching is not feasible, consider implementing configuration hardening and network controls to reduce the risk of exploitation.
Continuous monitoring of systems for any anomalous behavior is recommended to detect any possible exploitation attempts.
Detection Guidance
Security teams should monitor logs for any indicators of exploitation related to the ksmbd component, especially any unexpected file creations or changes to path buffers.
Behavioral anomalies in system performance should also be investigated, particularly in environments where the Linux kernel is utilized.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in its potential to disrupt the availability of systems relying on the Linux kernel. As organizations increasingly depend on this technology, understanding and mitigating such vulnerabilities becomes crucial.
The nature of this vulnerability highlights the importance of robust change management practices, especially in the context of local access vulnerabilities.
Security teams should take this opportunity to review their existing protocols and ensure that they are prepared to handle similar vulnerabilities in the future. Implementing thorough testing and validation processes can aid in identifying potential issues before they are exploited.
For further insights on vulnerability management, organizations can explore our vulnerability management program design.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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