{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "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‘gluebi->desc’ 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": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/mtd/mtd_blkdevs.c"
               ],
               "versions": [
                  {
                     "version": "2ba3d76a1e29",
                     "lessThan": "aeba358bcc8f",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "2ba3d76a1e29",
                     "lessThan": "1bf4fe14e97c",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "2ba3d76a1e29",
                     "lessThan": "001a3f59d8c9",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "2ba3d76a1e29",
                     "lessThan": "d8ac2537763b",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "2ba3d76a1e29",
                     "lessThan": "5389407bba1e",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "2ba3d76a1e29",
                     "lessThan": "cfd7c9d260dc",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "2ba3d76a1e29",
                     "lessThan": "b36aaa64d58a",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "2ba3d76a1e29",
                     "lessThan": "a43bdc376dea",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/mtd/mtd_blkdevs.c"
               ],
               "versions": [
                  {
                     "version": "2.6.31",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "2.6.31",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "4.19.306",
                     "lessThanOrEqual": "4.19.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.268",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.209",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.148",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.75",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.14",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.7.2",
                     "lessThanOrEqual": "6.7.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.8",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/aeba358bcc8ffddf9b4a9bd0e5ec9eb338d46022"
            },
            {
               "url": "https://git.kernel.org/stable/c/1bf4fe14e97cda621522eb2f28b0a4e87c5b0745"
            },
            {
               "url": "https://git.kernel.org/stable/c/001a3f59d8c914ef8273461d4bf495df384cc5f8"
            },
            {
               "url": "https://git.kernel.org/stable/c/d8ac2537763b54d278b80b2b080e1652523c7d4c"
            },
            {
               "url": "https://git.kernel.org/stable/c/5389407bba1eab1266c6d83e226fb0840cb98dd5"
            },
            {
               "url": "https://git.kernel.org/stable/c/cfd7c9d260dc0a3baaea05a122a19ab91e193c65"
            },
            {
               "url": "https://git.kernel.org/stable/c/b36aaa64d58aaa2f2cbc8275e89bae76a2b6c3dc"
            },
            {
               "url": "https://git.kernel.org/stable/c/a43bdc376deab5fff1ceb93dca55bcab8dbdc1d6"
            }
         ],
         "title": "mtd: Fix gluebi NULL pointer dereference caused by ftl notifier",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2023-52449",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}