{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0626e6641f6b467447c81dd7678a69c66f7746cf"
            },
            {
              "fixed": "5ef18a2e66f2f33fdac64437bddfb9fe6389fdc7"
            },
            {
              "fixed": "79242e7b6bc63efec28b7c235bc320806afce6c0"
            },
            {
              "fixed": "34abd408c8ba24d7c97bd02ba874d8c714f49db1"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.15.0"
            },
            {
              "fixed": "6.18.11"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31537.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: server: make use of smbdirect_socket.send_io.bcredits\n\nIt turns out that our code will corrupt the stream of\nreassabled data transfer messages when we trigger an\nimmendiate (empty) send.\n\nIn order to fix this we'll have a single 'batch' credit per\nconnection. And code getting that credit is free to use\nas much messages until remaining_length reaches 0, then\nthe batch credit it given back and the next logical send can\nhappen.",
  "id": "CVE-2026-31537",
  "modified": "2026-07-08T05:39:29.877142041Z",
  "published": "2026-04-24T14:30:24.907Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/34abd408c8ba24d7c97bd02ba874d8c714f49db1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ef18a2e66f2f33fdac64437bddfb9fe6389fdc7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/79242e7b6bc63efec28b7c235bc320806afce6c0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31537.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31537"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "smb: server: make use of smbdirect_socket.send_io.bcredits"
}