Vulnerability in Linux Kernel Affects ublk Component

CVE-2023-53508

What is CVE-2023-53508?

The vulnerability in the Linux kernel, specifically in the ublk component, occurs during the process of starting a device. When the function ublk_ctrl_start_dev() is called, an interruption by a signal while waiting for completion can lead to improper setup of device queues. As a result, the UBLK_CMD_START_DEV command could fail, potentially leading to kernel oops conditions. This issue was highlighted during the development of the qemu-storage-daemon, which relies on a single-threaded ublk daemon. Immediate attention to this component is crucial to ensure the stability of systems utilizing the affected kernel.

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