CyberRota Analysis
AI-GeneratedThe vulnerability affects the hinic3 driver in the Linux kernel, specifically related to the handling of socket buffers (skbs) during transmission. An attacker could exploit this flaw to cause out-of-bounds DMA reads or IOMMU faults, potentially leading to system instability or data corruption. Organizations using Linux systems with the hinic3 driver should prioritize this fix to mitigate the risk of these critical issues.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: hinic3: Fix skb linearization mismatch and drop skb when skb_checksum_help() failed Previously, hinic3_send_one_skb() cached the skb fragment count before calling hinic3_tx_offload(). If hinic3_tx_csum() falls back to skb_checksum_help() for unsupported tunnel packets, the skb may be linearized. Continuing to build the TX descriptor with the stale fragment count leads to a descriptor mismatch, which can trigger out-of-bounds DMA reads or IOMMU faults. Furthermore, the old code ignored the return value of skb_checksum_help(), transmitting corrupted packets with incomplete checksums upon failure. Fix this by: 1. Moving the hinic3_tx_offload() call before calculating 'num_sge' to ensure the correct fragment count is used if the SKB is linearized. 2. Propagating skb_checksum_help() errors and returning HINIC3_TX_OFFLOAD_INVALID to properly drop the skb.