{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "efcae97fa425ca6db9d126e37daccf2d7225cb09"
            },
            {
              "fixed": "88bce7e326c368d7df15126ccac537e54bebd467"
            },
            {
              "fixed": "74015b7be806ad9e21d46f7bd2831df280c6c783"
            },
            {
              "fixed": "41ebca28e17f84293650598f86bd69532ec1a8e0"
            },
            {
              "fixed": "62e5949f0dd5ec837af144860ff908369df4c7c9"
            },
            {
              "fixed": "8b989aaec85e1293a871d602590c951fe44b8647"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.4.16"
            },
            {
              "fixed": "6.6.157"
            },
            {
              "fixed": "6.12.109"
            },
            {
              "fixed": "6.18.50"
            },
            {
              "fixed": "7.2.4"
            },
            {
              "fixed": "7.3-rc1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89673.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: fix XDR padding calculation in ff_encode_getdeviceinfo\n\nnfsd4_ff_encode_getdeviceinfo() computes the da_addr_body reservation\nas 16 + netid_len + addr_len, but the subsequent xdr_encode_opaque()\ncalls emit 8 + round_up(netid_len, 4) + round_up(addr_len, 4) bytes.\nThe mismatch means the declared da_addr_body length exceeds the actual\nencoded data by 2-8 bytes on every flexfile GETDEVICEINFO reply,\nleaking stale reply-page content to the client and mis-aligning the\nsubsequent version list decode.\n\nUse xdr_align_size() for each string length to match what\nxdr_encode_opaque() actually writes.",
  "id": "CVE-2026-89673",
  "modified": "2026-09-16T03:31:03.020568666Z",
  "published": "2026-09-11T19:45:58.149Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41ebca28e17f84293650598f86bd69532ec1a8e0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/62e5949f0dd5ec837af144860ff908369df4c7c9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/74015b7be806ad9e21d46f7bd2831df280c6c783"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/88bce7e326c368d7df15126ccac537e54bebd467"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b989aaec85e1293a871d602590c951fe44b8647"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89673.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89673"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "nfsd: fix XDR padding calculation in ff_encode_getdeviceinfo"
}