Memory Leak Issue in Linux Kernel Affecting Network QRTR Functionality

CVE-2026-43041

What is CVE-2026-43041?

A memory leak vulnerability in the Linux Kernel's qrtr networking stack was identified, stemming from the use of a deprecated radix_tree API. In scenarios where memory allocation fails during the creation of a radix tree, orphaned internal nodes remain linked without corresponding leaf nodes. This results in unclaimed memory that cannot be freed, leading to potential memory exhaustion over time. The recommended fix involves transitioning from the radix_tree implementation to xarray, which provides a more efficient handling of memory cleanup, preventing any internal nodes from being orphaned when resources are released.

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