Race Condition in Linux Kernel's espintcp Functionality

CVE-2026-23239

What is CVE-2026-23239?

CVE-2026-23239 is a vulnerability identified in the Linux kernel's espintcp functionality, specifically due to a race condition in the espintcp_close() function. The Linux kernel is a core component of many operating systems, and it plays a vital role in managing hardware resources and providing essential services for application programs. This vulnerability arises when the function responsible for closing connections does not properly synchronize access to shared resources. As a result, it could allow the scheduling of work that references a context that has already been freed, leading to potential instability or system crashes. Organizations utilizing affected Linux kernel versions may face risks including denial of service or unintended behavior in network communications.

Potential impact of CVE-2026-23239

1. Denial of Service (DoS): The race condition could lead to a situation where services relying on the espintcp functionality become unresponsive or crash, disrupting business operations and accessibility to critical applications.

2. Data Corruption: The improper handling of freed resources may result in data being corrupted if applications attempt to access invalid or stale memory, potentially leading to loss or inconsistent states of data.

3. Increased Operational Risk: Exploiting this vulnerability could create an opportunity for attackers to execute further exploits, compromising system integrity and enabling unauthorized access to sensitive data or resources.

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