CVE-2023-53396 (GCVE-0-2023-53396)
Vulnerability from cvelistv5
Published
2025-09-18 13:33
Modified
2025-09-18 13:33
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ubifs: Fix memory leak in do_rename If renaming a file in an encrypted directory, function fscrypt_setup_filename allocates memory for a file name. This name is never used, and before returning to the caller the memory for it is not freed. When running kmemleak on it we see that it is registered as a leak. The report below is triggered by a simple program 'rename' that renames a file in an encrypted directory: unreferenced object 0xffff888101502840 (size 32): comm "rename", pid 9404, jiffies 4302582475 (age 435.735s) backtrace: __kmem_cache_alloc_node __kmalloc fscrypt_setup_filename do_rename ubifs_rename vfs_rename do_renameat2 To fix this we can remove the call to fscrypt_setup_filename as it's not needed.
Impacted products
Vendor Product Version
Linux Linux Version: c67bc98d1f0853bb196e9c48eab38b6f2ddab795
Version: 278d9a243635f26c05ad95dcf9c5a593b9e04dc6
Version: 278d9a243635f26c05ad95dcf9c5a593b9e04dc6
Version: 278d9a243635f26c05ad95dcf9c5a593b9e04dc6
Version: 278d9a243635f26c05ad95dcf9c5a593b9e04dc6
Version: 17495eb2f7f08113b50aba298c2c1a045824c4f7
Version: 868de33a39e0e1e91ed3ce4a23a65f30144d2443
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{
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nubifs: Fix memory leak in do_rename\n\nIf renaming a file in an encrypted directory, function\nfscrypt_setup_filename allocates memory for a file name. This name is\nnever used, and before returning to the caller the memory for it is not\nfreed.\n\nWhen running kmemleak on it we see that it is registered as a leak. The\nreport below is triggered by a simple program \u0027rename\u0027 that renames a\nfile in an encrypted directory:\n\n  unreferenced object 0xffff888101502840 (size 32):\n    comm \"rename\", pid 9404, jiffies 4302582475 (age 435.735s)\n    backtrace:\n      __kmem_cache_alloc_node\n      __kmalloc\n      fscrypt_setup_filename\n      do_rename\n      ubifs_rename\n      vfs_rename\n      do_renameat2\n\nTo fix this we can remove the call to fscrypt_setup_filename as it\u0027s not\nneeded."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-18T13:33:37.360Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/43b2f7d690697182beed6f71aa57b7249d3cfc9c"
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          "url": "https://git.kernel.org/stable/c/9f565752b328fe53c9e42b7d4e4d89a1da63d738"
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        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/3a36d20e012903f45714df2731261fdefac900cb"
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      ],
      "title": "ubifs: Fix memory leak in do_rename",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53396",
    "datePublished": "2025-09-18T13:33:37.360Z",
    "dateReserved": "2025-09-17T14:54:09.738Z",
    "dateUpdated": "2025-09-18T13:33:37.360Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53396\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-18T14:15:42.817\",\"lastModified\":\"2025-09-19T16:00:27.847\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nubifs: Fix memory leak in do_rename\\n\\nIf renaming a file in an encrypted directory, function\\nfscrypt_setup_filename allocates memory for a file name. This name is\\nnever used, and before returning to the caller the memory for it is not\\nfreed.\\n\\nWhen running kmemleak on it we see that it is registered as a leak. The\\nreport below is triggered by a simple program \u0027rename\u0027 that renames a\\nfile in an encrypted directory:\\n\\n  unreferenced object 0xffff888101502840 (size 32):\\n    comm \\\"rename\\\", pid 9404, jiffies 4302582475 (age 435.735s)\\n    backtrace:\\n      __kmem_cache_alloc_node\\n      __kmalloc\\n      fscrypt_setup_filename\\n      do_rename\\n      ubifs_rename\\n      vfs_rename\\n      do_renameat2\\n\\nTo fix this we can remove the call to fscrypt_setup_filename as it\u0027s not\\nneeded.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3a36d20e012903f45714df2731261fdefac900cb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/43b2f7d690697182beed6f71aa57b7249d3cfc9c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/517ddc0259d7a7231486bdafde8035c478bc4088\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7e264f67b7d6580eff5c2696961039fd05c69258\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9f565752b328fe53c9e42b7d4e4d89a1da63d738\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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