{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2023-52449",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2023-52449"
  ],
  "published": "2024-02-22T16:22:12Z",
  "summary": "mtd: Fix gluebi NULL pointer dereference caused by ftl notifier",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: Fix gluebi NULL pointer dereference caused by ftl notifier\n\nIf both ftl.ko and gluebi.ko are loaded, the notifier of ftl\ntriggers NULL pointer dereference when trying to access\n\u2018gluebi->desc\u2019 in gluebi_read().\n\nubi_gluebi_init\n  ubi_register_volume_notifier\n    ubi_enumerate_volumes\n      ubi_notify_all\n        gluebi_notify    nb->notifier_call()\n          gluebi_create\n            mtd_device_register\n              mtd_device_parse_register\n                add_mtd_device\n                  blktrans_notify_add   not->add()\n                    ftl_add_mtd         tr->add_mtd()\n                      scan_header\n                        mtd_read\n                          mtd_read_oob\n                            mtd_read_oob_std\n                              gluebi_read   mtd->read()\n                                gluebi->desc - NULL\n\nDetailed reproduction information available at the Link [1],\n\nIn the normal case, obtain gluebi->desc in the gluebi_get_device(),\nand access gluebi->desc in the gluebi_read(). However,\ngluebi_get_device() is not executed in advance in the\nftl_add_mtd() process, which leads to NULL pointer dereference.\n\nThe solution for the gluebi module is to run jffs2 on the UBI\nvolume without considering working with ftl or mtdblock [2].\nTherefore, this problem can be avoided by preventing gluebi from\ncreating the mtdblock device after creating mtd partition of the\ntype MTD_UBIVOLUME.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
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        "1:6.1.47-1+rpt2",
        "1:6.1.47-1+rpt4",
        "1:6.1.54-1+rpt2",
        "1:6.1.58-1+rpt2",
        "1:6.1.63-1+rpt1",
        "1:6.1.73-1+rpt1"
      ],
      "ecosystem_specific": {
        "binaries": [
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            "binary_version": "1:6.1.21-1+rpt1"
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  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-52449"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/aeba358bcc8ffddf9b4a9bd0e5ec9eb338d46022"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1bf4fe14e97cda621522eb2f28b0a4e87c5b0745"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/001a3f59d8c914ef8273461d4bf495df384cc5f8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d8ac2537763b54d278b80b2b080e1652523c7d4c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5389407bba1eab1266c6d83e226fb0840cb98dd5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cfd7c9d260dc0a3baaea05a122a19ab91e193c65"
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      "url": "https://git.kernel.org/stable/c/b36aaa64d58aaa2f2cbc8275e89bae76a2b6c3dc"
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      "url": "https://git.kernel.org/stable/c/a43bdc376deab5fff1ceb93dca55bcab8dbdc1d6"
    }
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
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}