CVE-2026-24795 is a medium-severity out-of-bounds write vulnerability in CloverHackyColor CloverBootloader, specifically affecting the MdeModulePkg/Universal/RegularExpressionDxe/Oniguruma modules. This issue arises from improper handling of program files associated with regcomp.C. The vulnerability is classified as a CWE-787 weakness, indicating a potential risk of memory corruption or application instability.
The CVSS score for this vulnerability is 5.1, reflecting a medium severity level. This score is based on various factors, including an attack vector classified as local and low attack complexity. Although the integrity and confidentiality impact are rated as none, there is a low availability impact that organizations must consider.
Organizations should prioritize addressing this vulnerability as it could lead to unexpected behavior in affected systems. Given the current status of the vulnerability as deferred, it is important to monitor for further developments and guidance.
No public exploit has been confirmed, and the vulnerability is not included in the Known Exploited Vulnerabilities (KEV) catalog, indicating that it may not be actively targeted at this time. Nevertheless, organizations should remain vigilant and apply best practices for security to mitigate any potential risks.
Vulnerability Details
The official description indicates that the vulnerability allows for an out-of-bounds write condition in the CloverHackyColor CloverBootloader, affecting versions prior to 5162. This vulnerability can lead to application instability, and its classification under CWE-787 emphasizes the need for remediation.
Organizations should be aware of the publication date of this vulnerability, which is January 27, 2026. Continuous monitoring and addressing of vulnerabilities in software are essential to maintaining the integrity and availability of systems.
Technical Analysis
The root cause of this vulnerability lies in the improper handling of memory during operations in the CloverHackyColor CloverBootloader. The attack vector is classified as local, meaning that an attacker would need local access to exploit this vulnerability. Given the low attack complexity and the lack of required privileges or user interaction, the potential for exploitation is non-trivial.
The availability impact is rated low, suggesting that while the vulnerability may not cause complete system outages, it could lead to degraded performance or unexpected behavior. Organizations should consider these impacts when assessing the risk associated with this vulnerability.
Risk & Impact Analysis
Risk to organizations includes potential application instability and unintentional behavior changes in CloverBootloader systems. As the CVSS score indicates a medium severity, organizations should address this vulnerability within their priority patch cycle.
With an EPS score of 0.000210000, this vulnerability is currently in the 0.059420000 percentile, indicating a low probability of exploitation in the wild. However, organizations should not overlook the potential impacts, especially given the local attack vector and low complexity associated with exploitation.
Organizations should prioritize patching immediately, given the potential for exploitation and the associated impacts on system integrity and availability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
This vulnerability affects all versions of CloverBootloader prior to 5162. Organizations using affected versions should assess their systems and prepare for remediation.
Mitigation & Remediation
To mitigate this vulnerability, organizations should promptly update CloverBootloader to version 5162 or later. If immediate patching is not feasible, implementing temporary workarounds such as restricting access to the CloverBootloader may help reduce exposure.
Organizations should also consider enhancing their security posture through regular security assessments and penetration testing. Effective security measures can assist in identifying vulnerabilities before they can be exploited.
For further guidance, organizations can refer to resources on penetration testing methodologies and security best practices.
Detection Guidance
Organizations should monitor logs for any unusual access patterns or system behaviors that could indicate attempts to exploit this vulnerability. Key indicators include unexpected application crashes or performance degradation related to the CloverBootloader.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2026-24795 lies in its potential to impact systems that rely on CloverBootloader, especially in environments where security is paramount. This vulnerability highlights ongoing risks associated with software dependencies that may not be actively maintained.
As a strategic takeaway, organizations should continuously evaluate their software ecosystems and prioritize software updates as part of their security hygiene. Regular assessments and engagement in application security assessments are vital in identifying potential vulnerabilities before they can be exploited.
Furthermore, organizations should consider integrating threat intelligence into their security operations to stay ahead of emerging vulnerabilities and risks, thereby enhancing their overall 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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