CVE-2024-50067: High Vulnerability in Linux Kernel

In the Linux kernel, a vulnerability has been identified that allows for out-of-bounds memory access when fetching arguments via the uprobe mechanism. This issue arises because user-space strings and arrays can exceed the size of the percpu buffer, which is limited to a single page. The function store_trace_args() fails to check if the data exceeds this limit, leading to a potential memory access violation.

This vulnerability has been classified as high severity with a CVSS score of 7.8. Organizations running affected versions of the Linux kernel are at risk, as this could lead to unauthorized access or privilege escalation. Immediate patching is essential.

To exploit this vulnerability, attackers may leverage the uprobe functionality to trigger the error condition, which has been demonstrated to occur under specific circumstances. Given the potential for high impact, organizations should prioritize their response.

Organizations should prioritize patching immediately. The patch is available, and systems should be updated to mitigate the risk associated with this vulnerability.

Vulnerability Details

The vulnerability in question allows for out-of-bounds memory access due to the improper handling of user-space strings and arrays in the Linux kernel's uprobe functionality. The CVSS score is 7.8, indicating a high severity level, which reflects the significant risk to confidentiality, integrity, and availability.

This vulnerability affects the Linux kernel, specifically versions from 3.14 up to but not including 6.12, along with various release candidates of version 6.12. The issue was published on October 28, 2024.

Technical Analysis

The root cause of this vulnerability lies in the mechanism by which arguments are fetched into the percpu buffer. When user-space strings exceed a single page in size, the lack of checks allows for potential out-of-bounds memory access, leading to undefined behavior.

The attack vector is local, requiring low privileges and no user interaction. The impact is severe, affecting confidentiality, integrity, and availability, making it critical for organizations to address immediately.

Risk & Impact Analysis

Risk to organizations includes the potential for unauthorized access and exploitation of system resources. The blast radius is broad, affecting any system running the vulnerable versions of the Linux kernel. Given the CVSS score of 7.8, organizations should assess their exposure and act swiftly to implement patches.

The urgency to remediate this vulnerability is high, especially considering the potential ramifications of exploitation in production environments. The availability of a patch necessitates immediate action from affected organizations.

Exploitation Status

Affected Versions

The vulnerable versions of the Linux kernel include all versions from 3.14 to 6.12, as well as release candidates 6.12:rc1, 6.12:rc2, 6.12:rc3, and 6.12:rc4. Organizations should ensure that they are running patched versions to mitigate this vulnerability.

Mitigation & Remediation

Organizations should apply the available patches for this vulnerability immediately. Upgrade to the latest stable version of the Linux kernel that addresses this issue. In the absence of a patch, organizations can implement workarounds such as restricting access to vulnerable components and enhancing monitoring on affected systems.

For further guidance on securing Linux applications, organizations can refer to the application security assessment services offered.

Detection Guidance

To detect potential exploitation of this vulnerability, organizations should monitor logs for anomalous behaviors associated with the uprobe functionality. Look for unusual access patterns or attempts to manipulate memory beyond allocated buffers.

AppSecure Threat Intelligence Insight

The long-term significance of this vulnerability highlights the importance of robust memory management practices within the Linux kernel. Security teams should consider this incident as a reminder to enhance their review processes for low-level memory operations to prevent similar vulnerabilities in the future.

Additionally, organizations should continuously evaluate their security posture through regular continuous penetration testing to identify and remediate vulnerabilities timely.

For organizations using cloud services, adopting a proactive stance with respect to security assessments, such as cloud penetration testing, can help mitigate risks associated with vulnerabilities like this.

Lastly, organizations should stay informed on security trends and statistics through resources like the ransomware statistics 2025 report to better understand the evolving threat landscape.