IPv6 Multicast Handling Issue in Linux Kernel

CVE-2025-38550

What is CVE-2025-38550?

In the Linux kernel, an improper handling of IPv6 multicast packets has been identified. Specifically, the management of identifiers within the multicast group was not adequately sequenced, affecting the reference management of multicast device instances. This flaw may lead to unintended consequences during the clearing of multicast source entries, which can destabilize the network's performance. Proper sequencing in the reference handling is critical to maintain network integrity and security.

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