irq exhaustion

About this tag
IRQ exhaustion occurs when a system runs out of interrupt request vectors, often due to driver bugs or hardware limitations. On WindowsForum.com, discussions cover cases like the Linux mlx5 driver (CVE-2025-40250) where exhausted IRQ vectors led to incorrect cleanup and kernel crashes. Troubleshooting IRQ exhaustion involves checking for driver updates, adjusting interrupt affinity, or reconfiguring hardware to reduce IRQ demand. While primarily a Linux topic, similar issues can arise in Windows environments with high-performance NICs or storage controllers. Users share diagnostic steps and fixes to prevent system instability from IRQ exhaustion.

  1. CVE-2025-40250: Linux mlx5 IRQ cleanup bug fix stops kernel crashes

    A subtle but consequential Linux kernel bug in the Mellanox/MLX5 driver has been assigned CVE‑2025‑40250: mlx5_irq_alloc could, on a failed request_irq caused by exhausted IRQ vectors, free the entire IRQ mapping (rmap) rather than only the mapping that failed, potentially triggering general...
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