Out-of-Bounds Shift Vulnerability in Amazon ENA Adapter

CVE-2023-53272

What is CVE-2023-53272?

A vulnerability in the ENA (Elastic Network Adapter) within the Linux kernel can lead to out-of-bounds shifts, potentially causing unexpected resets and instability. This issue arises due to an improper handling of exponential backoff timing in the device driver, which may result in excessively large reset delays that trigger undefined behavior (UBSAN panics). Developers have capped the shift value to avoid future overflows, ensuring more robust handling of reset timing and preventing degradation of service in cloud environments.

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