Linux Kernel Vulnerability in rpmsg Device Management

CVE-2022-50421

What is CVE-2022-50421?

A vulnerability exists in the Linux kernel related to the rpmsg device management, specifically involving the incorrect handling of the default endpoint in the rpmsg_chrdev_eptdev_destroy function. This flaw can lead to a double destruction scenario, ultimately resulting in a reference count underflow and potential use-after-free conditions. This issue is triggered when remoteproc is halted before the closure of the associated /dev/rpmsgX device, which can pose stability risks to systems utilizing rpmsg functionalities. System administrators and developers should ensure they are using updated kernel versions to mitigate this vulnerability.

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