{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-89559",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-89559"
  ],
  "published": "2026-09-11T19:47:07Z",
  "summary": "libnvdimm/labels: Prevent integer overflow in __nd_label_validate()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibnvdimm/labels: Prevent integer overflow in __nd_label_validate()\n\nThe on-media namespace index field nslot is a u32 read from the DIMM\nlabel storage area.  __nd_label_validate() bounds it against the config\narea size, but sizeof_namespace_label() returns unsigned, so the product\nnslot * label_size is evaluated in 32-bit and wraps modulo 2^32 before\nthe comparison.  A crafted nslot passes the bound and is then used as the\nloop trip count in nd_label_data_init(), whose memset() walks off the end\nof the config_size buffer: an out-of-bounds write.\n\nThe field is not trusted -- it comes from the medium, or from userspace\nvia ND_CMD_SET_CONFIG_DATA.  Evaluate the product in 64-bit so the bound\ncheck is exact; conforming labels are unaffected.\n\nThe check was safe when introduced by commit 4a826c83db4e (\"libnvdimm:\nnamespace indices: read and validate\"): it multiplied by sizeof(struct\nnd_namespace_label), a size_t, so on a 64-bit build the product did not\nwrap.  Commit 564e871aa66f (\"libnvdimm, label: add v1.2 nvdimm label\ndefinitions\") narrowed it to 32 bits when the label size became a runtime\nvalue read via sizeof_namespace_label().",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.188",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-89559"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b4975f2ff6c82adc24ae547f029f82530ba43cfe"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6030597ec683d1e5b46445f888bb5c7776b5a0c4"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1c391696d2791f82ae462e11da9a0d96f90b240c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/93967bfb17dab66642c57e609c99e1a91fe11278"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e057efcc9c71d90099d9ee00bed0748d0e9fd586"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/09e649117c54b7e1c004f22eaa19efbadd9ac856"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/69a734359639fca16a0dd73ab17a34943e76c68b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/037770686126155eafc44501312989e2837b9659"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-14T12:06:03Z"
  }
}