CVE-2025-21694

Summary

CVE-2025-21694 is a vulnerability affecting the Linux kernel's `fs/proc` component. This issue, which was resolved in commit 5cbcb62dddf5, involves softlockups in the `__read_vmcore` function during kdump time. Although the number of occurrences has decreased, softlockups can still interfere with critical memory management tasks like RCU, resulting in crashes. To address this concern, a `cond_resched()` call has been added to the second loop in `__read_vmcore` to help eliminate softlockups and ensure the stability of the kdump image.

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