{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "3f2304f8c6d6ed97849057bd16fee99e434ca796"
            },
            {
              "fixed": "99066cf9bba175f610ceb61a35f6fc9fbc33ff65"
            },
            {
              "fixed": "8a02ad98798fd01f51f648c1fdd8f3c9d07195d3"
            },
            {
              "fixed": "832a685efeb5d925ee7d30011d2dbe45f81447a3"
            },
            {
              "fixed": "7fa3f73f6c8ddc5f0425b50fb2a626a782ef7d12"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0"
            },
            {
              "fixed": "6.12.109"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89480.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-tcp: reject a read that transferred too few bytes\n\nnvme_tcp_recv_data() completes a request once the current C2HData PDU\nhas been consumed. Nothing compares the total bytes received against\nthe length the command asked for: struct nvme_tcp_request has no\nreceive-side counter, queue-\u003edata_remaining is per queue, and\nblk_mq_end_request() completes for blk_rq_bytes(rq) unconditionally\nwith no residual concept anywhere above.\n\nA controller can therefore answer a 4096-byte read with 512 bytes and\nhave it reported as a complete read; user space then gets 4096 bytes of\nwhich 3584 are whatever was already in the page. I reproduced that with\na test target.\n\nCount the bytes received and refuse to complete a successful read whose\ncount does not match, at the two NVME_TCP_F_DATA_SUCCESS paths and in\nnvme_tcp_process_nvme_cqe(). The success test shifts req-\u003estatus right\nby one, because the driver keeps the wire value there and shifts it on\ncompletion, so the check must see what the completion path will see.\nOnly REQ_OP_READ is checked, because there the length comes from the\nsectors the request covers; a passthrough command is built by its\nsubmitter, which picks both command and buffer, so the kernel has\nnothing to compare against.",
  "id": "CVE-2026-89480",
  "modified": "2026-09-13T03:30:27.813933147Z",
  "published": "2026-09-11T19:43:35.930Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7fa3f73f6c8ddc5f0425b50fb2a626a782ef7d12"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/832a685efeb5d925ee7d30011d2dbe45f81447a3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8a02ad98798fd01f51f648c1fdd8f3c9d07195d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/99066cf9bba175f610ceb61a35f6fc9fbc33ff65"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89480.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89480"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "nvme-tcp: reject a read that transferred too few bytes"
}