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CVE-2025-39971 is an out-of-bounds write vulnerability in the Linux kernel Intel i40e network driver. In i40e_vc_config_queues_msg(), the driver iterates over vf->ch[idx] without adequately validating that idx is within the range of active or initialized traffic classes. A malformed configuration-queues message can therefore cause an invalid array access. The upstream fix validates idx before accessing the traffic-class channel entry.
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A Linux kernel vulnerability in the i40e driver involving improper idx validation in config queues handling, fixed by ensuring the index is within the range of active or initialized traffic classes when iterating over vf->ch[idx] in i40e_vc_config_queues_msg().
A Linux kernel Intel i40e network-driver vulnerability involving insufficient index validation in configuration-queue messages.
A Linux kernel i40e driver vulnerability involving insufficient index validation in configuration-queue messages. It is addressed by the Red Hat kernel-rt security update.
An input-validation vulnerability in the Linux kernel i40e driver’s configuration-queues message handling.
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Cross-references every affected SKU, including bundled OEM variants.
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