{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "c900e49d58eb32b192b6d200ace4ae3ab89779d4"
            },
            {
              "fixed": "2a0323a913109b52bfc9f5ea7b92a1b249e07d3e"
            },
            {
              "fixed": "3c3a6b9020c01fde7b22e8550105de0b59904f61"
            },
            {
              "fixed": "d1978d03e86785872871bff9c2623174b10740de"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.15.0"
            },
            {
              "fixed": "6.18.22"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43031.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: xilinx: axienet: Fix BQL accounting for multi-BD TX packets\n\nWhen a TX packet spans multiple buffer descriptors (scatter-gather),\naxienet_free_tx_chain sums the per-BD actual length from descriptor\nstatus into a caller-provided accumulator. That sum is reset on each\nNAPI poll. If the BDs for a single packet complete across different\npolls, the earlier bytes are lost and never credited to BQL. This\ncauses BQL to think bytes are permanently in-flight, eventually\nstalling the TX queue.\n\nThe SKB pointer is stored only on the last BD of a packet. When that\nBD completes, use skb-\u003elen for the byte count instead of summing\nper-BD status lengths. This matches netdev_sent_queue(), which debits\nskb-\u003elen, and naturally survives across polls because no partial\npacket contributes to the accumulator.",
  "id": "CVE-2026-43031",
  "modified": "2026-07-15T01:49:08.544581368Z",
  "published": "2026-05-01T14:15:31.256Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a0323a913109b52bfc9f5ea7b92a1b249e07d3e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c3a6b9020c01fde7b22e8550105de0b59904f61"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d1978d03e86785872871bff9c2623174b10740de"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43031.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43031"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "net: xilinx: axienet: Fix BQL accounting for multi-BD TX packets"
}