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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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              "lang": "en",
              "value": "AV:L - The stale neighbour pointer is dereferenced through local netlink operations, including unprivileged devlink DPIPE queries; received packets alone cannot complete exploitation.\nAC:L - An attacker can churn neighbour entries and repeatedly trigger the dereference, and the flaw reproduced after only a few iterations. No race condition beyond the attacker\u0027s practical influence is required.\nPR:L - The demonstrated VRF-detach path requires init-namespace CAP_NET_ADMIN, but DEVLINK_CMD_DPIPE_ENTRIES_GET lacks GENL_ADMIN_PERM and dereferences the same stale pointer. A basic local user can therefore reach the vulnerable object.\nUI:N - Once the vulnerable neighbour state exists, the attacker can issue the triggering netlink requests without another user\u0027s participation.\nS:U - The corruption occurs within the host kernel and does not inherently cross a VM, IOMMU, or other distinct security authority.\nC:H - The freed neighbour\u0027s table pointer and primary key are read, with address bytes potentially returned through DPIPE. Heap reclamation and spraying make broader kernel-memory disclosure defensible.\nI:H - mlxsw_sp_neigh_entry_update() performs a read-modify-write on the freed object\u0027s flags field. Reclaiming the allocation can therefore corrupt another heap object and potentially enable control-flow hijacking.\nA:H - Dereferencing the reclaimed table pointer or corrupting the replacement object can cause an oops or kernel panic. The trigger can be repeated until the failure occurs."
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