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unauthenticated IPv6 fragments requires no kernel credentials; VRF/L3-master configuration is a deployment condition on routers and cloud hosts, not a privilege the attacker must hold to deliver the triggering traffic.\nUI:N - Exploitation needs only network delivery of fragmented IPv6 packets during interface teardown; no victim action such as opening files, clicking links, or mounting filesystems is required.\nS:U - The NULL dereference crashes the kernel on the receiving host but does not cross a VM, container, or IOMMU security boundary; impact stays within the same kernel security authority.\nC:N - The failure is a NULL pointer read in __in6_dev_get(NULL) after dev_get_by_index_rcu() returns NULL; there is no use-after-free, out-of-bounds read, or other information-disclosure primitive.\nI:N - The bug dereferences a NULL net_device pointer for statistics lookup only; it provides no memory write, corruption, or control-flow hijack primitive beyond crashing the kernel.\nA:H - The NULL dereference during IPv6 fragment receive/reassembly processing in softirq context causes a kernel OOPS or panic, fully denying availability on the affected system until reboot."}]}],"providerMetadata":{"dateUpdated":"2026-08-29T06:21:41.550Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/a23f2c68c6635e41404f189f8f7ae910738cebdb"},{"url":"https://git.kernel.org/stable/c/e14db43677946bf2095febd294bb3c13ab375ab7"},{"url":"https://git.kernel.org/stable/c/1a4adfbeb47a212a64539137411f1ca168474d33"},{"url":"https://git.kernel.org/stable/c/1e3db30a88815bae6e9d5db6f64ac735e615a07e"},{"url":"https://git.kernel.org/stable/c/952426a83ca75cea25c09d58944abafaa3ebd242"},{"url":"https://git.kernel.org/stable/c/0db1949084e85a72d174a7dea3259b94fe5a9305"},{"url":"https://git.kernel.org/stable/c/fc920c0659cdea5afd8721c1155a51564859e075"},{"url":"https://git.kernel.org/stable/c/507541c2a8eeb76c02bd2511958f73a8cfa3e1bc"}],"title":"ipv6: guard against possible NULL deref in 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unregistered.\n\nFound by Sashiko.","Type":"Description","Title":"ipv6: guard against possible NULL deref in __in6_dev_stats_get()"}]}}}