Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: xilinx: axienet: Fix BQL accounting for multi-BD TX packets When a TX packet spans multiple buffer descriptors (scatter-gather), axienet_free_tx_chain sums the per-BD actual length from descriptor status into a caller-provided accumulator. That sum is reset on each NAPI poll. If the BDs for a single packet complete across different polls, the earlier bytes are lost and never credited to BQL. This causes BQL to think bytes are permanently in-flight, eventually stalling the TX queue. The SKB pointer is stored only on the last BD of a packet. When that BD completes, use skb->len for the byte count instead of summing per-BD status lengths. This matches netdev_sent_queue(), which debits skb->len, and naturally survives across polls because no partial packet contributes to the accumulator.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected c900e49d58eb32b192b6d200ace4ae3ab89779d4 before 2a0323a913109b52bfc9f5ea7b92a1b249e07d3e; affected c900e49d58eb32b192b6d200ace4ae3ab89779d4 before 3c3a6b9020c01fde7b22e8550105de0b59904f61; affected c900e49d58eb32b192b6d200ace4ae3ab89779d4 before d1978d03e86785872871bff9c2623174b10740de |
| Linux / Linux | affected 6.15; unaffected 0 before 6.15; unaffected 6.18.22 through 6.18.*; unaffected 6.19.12 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.