{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: drop ppath from ext4_ext_replay_update_ex() to avoid double-free\n\nWhen calling ext4_force_split_extent_at() in ext4_ext_replay_update_ex(),\nthe 'ppath' is updated but it is the 'path' that is freed, thus potentially\ntriggering a double-free in the following process:\n\next4_ext_replay_update_ex\n  ppath = path\n  ext4_force_split_extent_at(&ppath)\n    ext4_split_extent_at\n      ext4_ext_insert_extent\n        ext4_ext_create_new_leaf\n          ext4_ext_grow_indepth\n            ext4_find_extent\n              if (depth > path[0].p_maxdepth)\n                kfree(path)                 ---> path First freed\n                *orig_path = path = NULL    ---> null ppath\n  kfree(path)                               ---> path double-free !!!\n\nSo drop the unnecessary ppath and use path directly to avoid this problem.\nAnd use ext4_find_extent() directly to update path, avoiding unnecessary\nmemory allocation and freeing. Also, propagate the error returned by\next4_find_extent() instead of using strange error codes."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/ext4/extents.c"
               ],
               "versions": [
                  {
                     "version": "8016e29f4362",
                     "lessThan": "8c26d9e53e5f",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "8016e29f4362",
                     "lessThan": "a34bed978364",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "8016e29f4362",
                     "lessThan": "6367d3f04c69",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "8016e29f4362",
                     "lessThan": "1b558006d98b",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "8016e29f4362",
                     "lessThan": "3ff710662e8d",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "8016e29f4362",
                     "lessThan": "63adc9016917",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "8016e29f4362",
                     "lessThan": "5c0f4cc84d3a",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "fs/ext4/extents.c"
               ],
               "versions": [
                  {
                     "version": "5.10",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "5.10",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.227",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.168",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.113",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.55",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.10.14",
                     "lessThanOrEqual": "6.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.11.3",
                     "lessThanOrEqual": "6.11.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.12-rc1",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/8c26d9e53e5fbacda0732a577e97c5a5b7882aaf"
            },
            {
               "url": "https://git.kernel.org/stable/c/a34bed978364114390162c27e50fca50791c568d"
            },
            {
               "url": "https://git.kernel.org/stable/c/6367d3f04c69e2b8770b8137bd800e0784b0abbc"
            },
            {
               "url": "https://git.kernel.org/stable/c/1b558006d98b7b0b730027be0ee98973dd10ee0d"
            },
            {
               "url": "https://git.kernel.org/stable/c/3ff710662e8d86a63a39b334e9ca0cb10e5c14b0"
            },
            {
               "url": "https://git.kernel.org/stable/c/63adc9016917e6970fb0104ee5fd6770f02b2d80"
            },
            {
               "url": "https://git.kernel.org/stable/c/5c0f4cc84d3a601c99bc5e6e6eb1cbda542cce95"
            }
         ],
         "title": "ext4: drop ppath from ext4_ext_replay_update_ex() to avoid double-free",
         "x_generator": {
            "engine": "bippy-c9c4e1df01b2"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-49983",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}