{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "db1312dd95488b5e6ff362ff66fcf953a46b1821"
            },
            {
              "fixed": "89ff11b72f38976f3b5aea23a5228ee05e277209"
            },
            {
              "fixed": "aaac783950b17c57df9b6f7344747cacb1a407ed"
            },
            {
              "fixed": "c38a8186326799957d293d370136c128cd113916"
            },
            {
              "fixed": "7b81e4d2230e3d2d372c826180c4ef0efc244f31"
            },
            {
              "fixed": "5bb96cc218835769ab74ec7f3ea2bf81fbffe955"
            }
          ],
          "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": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90230.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()\n\nnvmet_execute_auth_send() allocates the DH-HMAC-CHAP message buffer with\nthe host-supplied transfer length (tl) and hands it to\nnvmet_auth_negotiate() without passing tl along. nvmet_auth_negotiate()\nthen reads the negotiate header and, for each of the halen hash\nidentifiers and dhlen DH group identifiers, indexes into the fixed\nidlist[60] array (hashes at idlist[0..halen), groups at idlist[30..]).\n\nNeither the transfer length nor halen/dhlen is validated. A malicious or\nnon-conformant host can report a tl smaller than the negotiate structure,\nor a halen/dhlen larger than the array (both are u8, up to 255), making\nthe loops read past the end of the allocated buffer (heap out-of-bounds\nread). The sibling nvmet_auth_reply() already validates tl against the\nstructure size; the negotiate path did not.\n\nPass tl into nvmet_auth_negotiate(), reject a tl that does not cover the\nnegotiate data plus one full protocol descriptor, and reject halen/dhlen\nlarger than NVME_AUTH_DHCHAP_MAX_DH_IDS.",
  "id": "CVE-2026-90230",
  "modified": "2026-09-20T11:30:50.205036654Z",
  "published": "2026-09-17T16:07:37.940Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5bb96cc218835769ab74ec7f3ea2bf81fbffe955"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7b81e4d2230e3d2d372c826180c4ef0efc244f31"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/89ff11b72f38976f3b5aea23a5228ee05e277209"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aaac783950b17c57df9b6f7344747cacb1a407ed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c38a8186326799957d293d370136c128cd113916"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90230.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90230"
    },
    {
      "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:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()"
}