{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "db1312dd95488b5e6ff362ff66fcf953a46b1821"
            },
            {
              "fixed": "80bf7b7f676e3987bbe06af3c359bd56ac91a5a9"
            },
            {
              "fixed": "2eaa3ad450141cfcf187bb43cb8335eb336b5f87"
            },
            {
              "fixed": "bc111698b46e43eddd8664cceaa621cd559e99a0"
            },
            {
              "fixed": "779575bc35c687697ba69e904f2cd22e60112534"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.12.101"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72130.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-auth: reject short AUTH_RECEIVE buffers\n\nnvmet_execute_auth_receive() trusts the AUTH_RECEIVE allocation length\nafter checking only that it is nonzero and matches the transfer length.\nIn the SUCCESS1 and FAILURE1/default states, that lets a remote NVMe-oF\ninitiator reach the fixed-size DH-HMAC-CHAP response builders with a\nkmalloc() buffer shorter than the response, so nvmet_auth_success1() and\nnvmet_auth_failure1() write past the allocation; both only WARN_ON the\nshort length and then format the message anyway.\n\nImpact: A remote NVMe-oF initiator with access to an auth-enabled target\ncan trigger a 16-byte heap out-of-bounds write via a one-byte\nAUTH_RECEIVE allocation length.\n\nCompute the minimum response length for the current DH-HMAC-CHAP step in\nnvmet_auth_receive_data_len() and report a zero data length when the\nhost-supplied allocation length is shorter, so the existing zero-length\ncheck in nvmet_execute_auth_receive() rejects the command before any\nbuilder runs. The SUCCESS1 minimum is sizeof(struct\nnvmf_auth_dhchap_success1_data) plus the HMAC hash length, because the\nresponse hash is written into the rval[] flexible-array tail, so the\nminimum is state dependent rather than a flat sizeof. CHALLENGE keeps its\nexisting variable-length guard in nvmet_auth_challenge().\n\nThis is reachable only when in-band DH-HMAC-CHAP authentication is\nconfigured on the target.",
  "id": "CVE-2026-72130",
  "modified": "2026-08-18T03:31:18.119833868Z",
  "published": "2026-08-15T05:53:06.604Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2eaa3ad450141cfcf187bb43cb8335eb336b5f87"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/779575bc35c687697ba69e904f2cd22e60112534"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/80bf7b7f676e3987bbe06af3c359bd56ac91a5a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bc111698b46e43eddd8664cceaa621cd559e99a0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72130.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72130"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "nvmet-auth: reject short AUTH_RECEIVE buffers"
}