Use-After-Free Vulnerability in Linux Kernel's QRTR Network Protocol

CVE-2023-53445

What is CVE-2023-53445?

A use-after-free vulnerability has been identified in the Linux kernel affecting the QRTR network protocol, specifically in the qrtr_recvmsg() function. This vulnerability arises due to inadequate reference count management during concurrent operations, which may lead to potential exploit scenarios. The issue occurs when qrtr_recvmsg() and qrtr_endpoint_unregister() are executed in a race condition, where one thread might try to access a memory location that has already been freed by another. The resolution involves implementing proper locking mechanisms to protect node reference integrity and improve system stability.

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