Linux Kernel Vulnerability Affecting Timer Setup Mechanism

CVE-2026-80727

What is CVE-2026-80727?

A vulnerability has been identified in the Linux kernel related to improper timer configuration during the CMCI storm detection process. Specifically, the issue arises when the polling timer is not adequately set up before the discovery phase occurs, leading to potential system instability. The vulnerability manifests as error messages indicating assertions related to the timer's initialization state. This oversight can cause unexpected behavior in the kernel, particularly impacting CPU monitoring and error handling. The resolution involves ensuring that the timer is properly configured before any modification attempts, thereby stabilizing the system's response to monitoring and error detection.

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