CVE-2026-13212: Virtio Unvalidated Used Ring Index
Virtio used-ring descriptor ID is used as an array index without bounds checking against the queue size. An untrusted virtio device or host backend can supply an out-of-bounds ID to trigger out-of-bounds access or control-flow hijacking. Validate that the descriptor ID is within queue bounds (e.g., id < vq->num).
Cgreprules fetch cve-2026-13212-virtio-unvalidated-used-ring-index --engine opengrepDescription
Virtio used-ring descriptor ID is used as an array index without bounds checking against the queue size. An untrusted virtio device or host backend can supply an out-of-bounds ID to trigger out-of-bounds access or control-flow hijacking. Validate that the descriptor ID is within queue bounds (e.g., id < vq->num).
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