PCI Error Recovery Vulnerability in Linux Kernel Affecting s390 Architecture

CVE-2025-68310

What is CVE-2025-68310?

A vulnerability in the Linux kernel associated with PCI error recovery has been identified. This issue arises during the handling of PCI errors on the s390 architecture, potentially leading to a deadlock scenario. Specifically, the mlx5_core component may hang when PCI configurations are accessed, creating blocks in tasks and ultimately causing prolonged system unresponsiveness. The root cause stems from improper locking mechanisms which interfere with the error recovery processes. To mitigate this risk, it is essential to implement the latest patches that adjust the locking strategy, allowing for a smoother recovery without compromising system performance.

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