Linux Kernel Vulnerability in IP Multicast Routing Management

CVE-2025-21719

Summary

A vulnerability in the Linux kernel's IP multicast routing management has been identified, where improper handling of unres entries leads to potential system crashes. This flaw, stemming from an erroneous function call to mr_mfc_uses_dev(), can cause memory access issues, impacting overall network stability. The code has been determined ineffective and is scheduled for removal to mitigate these risks. Keeping systems updated with the latest kernel patches will help safeguard against this vulnerability.

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