Kernel Vulnerability in Linux Affecting Memory Management Processes

CVE-2025-40340

What is CVE-2025-40340?

A vulnerability has been identified in the Linux kernel linked to the xe_gem_fault component. This issue arises during the core_hotunplug testing process, resulting in an unexpected system crash. The problem occurs when a process attempts to map memory but encounters issues due to the FAULT_FLAG_RETRY_NOWAIT logic. This leads to situations where the system lacks available process memory, returning a VM_FAULT_NOPAGE error. Consequently, the vulnerability triggers a failure in memory type verification, specifically when the resource is NULL, causing an operational crash. Proper resolutions have been implemented to address this vulnerability and maintain system stability.

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