Out-of-Bounds Access Vulnerability in Linux Kernel with SFQ Scheduler

CVE-2025-37752

What is CVE-2025-37752?

CVE-2025-37752 is a vulnerability identified in the Linux kernel, specifically associated with the Stochastic Fairness Queueing (SFQ) scheduler. This critical flaw involves an out-of-bounds access issue, which could allow unauthorized entities to manipulate data within the kernel. If exploited, this vulnerability has the potential to lead to severe operational disruptions, including system crashes or unauthorized access, jeopardizing the integrity and stability of critical infrastructure that relies on the Linux operating system.

Technical Details

The vulnerability stems from an inadequate validation mechanism concerning user-defined limits within the SFQ configuration. Specifically, the flaw occurs during the update process of certain parameters where the limit is not properly validated against indirect updates. This deficiency can result in out-of-bounds access, where the kernel attempts to access memory locations beyond allocated limits, leading to potential instability or security breaches. The issue has been addressed by moving the limit validation check to ensure it is performed after all configuration updates.

Potential Impact of CVE-2025-37752

1. System Crashes: Exploitation of this vulnerability may lead to unexpected kernel crashes, impacting system availability and functionality. Such disruptions can be particularly detrimental for organizations relying on continuous uptime for their services.

2. Security Breaches: There is a risk of unauthorized access to sensitive data or system controls, as attackers could exploit the out-of-bounds access to manipulate kernel operations in a way that bypasses standard security protocols.

3. Operational Disruptions: Organizations may face significant operational challenges due to the vulnerability’s potential to destabilize network scheduling processes, leading to performance degradation and hampered resource allocation across networking hardware.

News Articles

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CVE-2025-37752

CVE-2025-37752 Impact, Exploitability, and Mitigation Steps | Wiz

Understand the critical aspects of CVE-2025-37752 with a detailed vulnerability assessment, exploitation potential, affected technologies, and remediation guidance.

4 days ago

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