CVE-2024-0582 is a high-severity vulnerability affecting the Linux kernel, specifically its io_uring functionality. The vulnerability arises from a memory leak flaw during the registration of a buffer ring using IORING_REGISTER_PBUF_RING, followed by mmap() and subsequent freeing of the buffer. This flaw allows a local user to potentially crash the system or escalate their privileges, making it critical for organizations to take immediate action.
With a CVSS score of 7.8, this vulnerability is classified as high severity. The attack vector is local, requiring low complexity and privileges. Moreover, the potential impact on confidentiality, integrity, and availability is significant, posing a risk to organizations' operational integrity.
As of now, the vulnerability has not been listed in the Known Exploited Vulnerabilities (KEV) catalog; however, there are public proof-of-concept (PoC) exploits available on GitHub. Organizations are urged to prioritize remediation efforts, especially those running affected versions of the Linux kernel.
Organizations should prioritize patching immediately to mitigate the risks associated with this vulnerability.
Vulnerability Details
The official description states that a memory leak flaw was discovered in how a user registers a buffer ring using IORING_REGISTER_PBUF_RING in the Linux kernel's io_uring functionality. This vulnerability is classified under CWE-416 (Use After Free). It affects various versions of the Linux kernel, specifically those from version 6.4 up to but not including 6.6.5, as well as release candidates 6.7:rc1, 6.7:rc2, and 6.7:rc3.
The vulnerability was published on January 16, 2024, and has been classified with a CVSS base score of 7.8, indicating the high severity of potential exploits.
Technical Analysis
The root cause of this vulnerability is a memory leak that occurs during buffer registration in the io_uring subsystem. The attack vector is local, meaning the attacker must have access to the system. The attack complexity is low, requiring low privileges, and no user interaction is needed to exploit this vulnerability. Once an attacker can exploit this flaw, they can achieve high confidentiality, integrity, and availability impacts, allowing them to crash the system or escalate privileges.
Risk & Impact Analysis
Organizations running vulnerable versions of the Linux kernel face significant risks. The potential for privilege escalation and system crashes represents a critical threat to operational integrity. Given the high CVSS score, organizations should assess their exposure and prioritize patching as part of their regular update cycle.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects the following versions of the Linux kernel: any version from 6.4 up to but not including 6.6.5, and release candidates 6.7:rc1, 6.7:rc2, and 6.7:rc3.
Mitigation & Remediation
Organizations should update their systems to the latest patched version of the Linux kernel to mitigate this vulnerability. If immediate patching is not possible, organizations can implement workarounds such as restricting access to the affected systems and applying configuration hardening measures. For continuous security, consider adopting continuous penetration testing to identify and address similar vulnerabilities.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor for unusual memory usage patterns, system crashes, and unauthorized privilege escalations. Regular log reviews and behavioral anomaly detections can help identify compromised systems.
AppSecure Threat Intelligence Insight
The emergence of CVE-2024-0582 highlights the ongoing challenges in maintaining secure kernel implementations. It emphasizes the need for security teams to continually assess their systems against known vulnerabilities. The presence of multiple PoCs indicates a heightened interest in exploiting this vulnerability, suggesting that proactive defensive measures, including regular updates and penetration testing methodologies, are essential to mitigate risks.
Organizations should additionally consider reviewing their security policies and incident response plans to ensure they are equipped to handle similar vulnerabilities in the future. Continuous education and awareness training within the organization will also play a crucial role in maintaining high security standards.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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