The Linux kernel is a widely used operating system that provides the foundation for many applications. This vulnerability occurs in the microchip-specific DSA (Direct Sampling Architecture) driver, which handles interrupts on certain microchip-based devices. If not properly initialized, the ksz_irq_free() function can be called on uninitialized IRQ numbers, leading to potential issues with interrupt handling.
You're affected if you use Linux kernel versions prior to 5.15. This is a low-level vulnerability that requires intimate knowledge of Linux kernel internals and microchip-specific hardware configurations. If you don't recognize the term "Linux kernel" or "DSA driver," you're probably not affected.
Version info: Not specified in the advisory.
To fix this issue, update to a supported Linux kernel version (5.15 or later). You can check your current kernel version using:
uname -r
If an immediate patch isn't available, consider restricting network access to your system and monitoring for suspicious activity related to IRQ handling.