In the Linux kernel, a high-severity vulnerability has been identified that affects the NTFS file system. This vulnerability allows an attacker to exploit issues related to attribute size checks, leading to potential memory corruption. The vulnerability has been assigned a CVSS score of 7.1, indicating a high level of severity due to its potential impact on confidentiality and availability.
Risk to organizations includes unauthorized access and system instability, which can lead to significant operational disruptions. The vulnerability is classified as a slab-out-of-bounds error, which means that it could allow an attacker to write outside the bounds of allocated memory, leading to unpredictable behavior or data corruption.
Currently, there is no public exploit confirmed for this vulnerability, but given its characteristics, it poses a considerable risk, particularly for systems that have not been updated. Organizations should prioritize patching immediately to mitigate potential threats.
The vulnerability was published on October 1, 2025, and has been analyzed for its severity. Organizations using affected versions of the Linux kernel are strongly advised to schedule remediation as soon as possible.
Vulnerability Details
The vulnerability identified as CVE-2023-53486 is described as follows: 'In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Enhance the attribute size check. This combines the overflow and boundary check so that all attribute size will be properly examined while enumerating them.'
The CVSS score of 7.1 indicates a high severity level, with key impacts including high confidentiality and availability impact while having no integrity impact. The affected product is the Linux kernel, which is commonly used across various distributions.
This vulnerability falls under CWE-125, which pertains to out-of-bounds read issues. Organizations must be aware of how this can affect their systems, particularly those relying on NTFS file systems.
Technical Analysis
The root cause of CVE-2023-53486 stems from insufficient validation of attribute sizes during enumeration. This oversight can lead to slab-out-of-bounds errors, which are indicative of potential memory corruption vulnerabilities.
The attack vector is local, meaning that an attacker must have local access to exploit this vulnerability. The attack complexity is categorized as low, and it requires low privileges to execute, exacerbating the risk.
User interaction is not required for exploitation, and the impact on confidentiality is high due to potential data exposure. Availability impact is also high, as the vulnerability could lead to system crashes or instability.
Risk & Impact Analysis
Real-world deployment of this vulnerability could lead to significant risks for organizations. The potential for unauthorized access and data exposure is a primary concern, especially in environments where sensitive information is handled.
The blast radius of this vulnerability is substantial due to the widespread use of the Linux kernel across various systems and environments. Organizations running outdated versions are particularly vulnerable and must act quickly.
Urgency for remediation is high, given the CVSS score of 7.1 and the current absence of public exploits. Organizations should address this vulnerability in their priority patch cycle to prevent potential exploitation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The versions of the Linux kernel that are affected by CVE-2023-53486 include:
1. All versions prior to vendor patch for versions 5.15.113, 6.1.80, and 6.3.4.
Mitigation & Remediation
Organizations should ensure that they apply the latest patches to their Linux kernel installations. The relevant patches for CVE-2023-53486 can be found in the official Linux kernel repository. For those unable to patch immediately, temporary workarounds should be implemented where possible, such as restricting access to vulnerable systems.
For further guidance on validating security measures, organizations can explore continuous penetration testing to ensure their systems are secure against similar vulnerabilities.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor for unusual behavior in the NTFS file system and check system logs for any anomalies related to memory allocation or crashes. Implementing network signatures that can detect abnormal mounting behavior may also be beneficial.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-53486 lies in its representation of ongoing security challenges within the Linux kernel. This vulnerability highlights the necessity for continuous security assessments and the importance of patch management in mitigating risks.
Security teams should note the trends in kernel vulnerabilities and the potential for exploitation in local environments. Proactive measures, such as regular patching and conducting security assessments, are crucial for defending against similar vulnerabilities in the future.
For further reading on security practices, organizations may find the following resources beneficial: penetration testing methodology, vulnerability management program design, and API security best practices to enhance their security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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