CVE-2022-50864 (GCVE-0-2022-50864)
Vulnerability from cvelistv5
Published
2025-12-30 12:15
Modified
2025-12-30 12:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix shift-out-of-bounds due to too large exponent of block size If field s_log_block_size of superblock data is corrupted and too large, init_nilfs() and load_nilfs() still can trigger a shift-out-of-bounds warning followed by a kernel panic (if panic_on_warn is set): shift exponent 38973 is too large for 32-bit type 'int' Call Trace: <TASK> dump_stack_lvl+0xcd/0x134 ubsan_epilogue+0xb/0x50 __ubsan_handle_shift_out_of_bounds.cold.12+0x17b/0x1f5 init_nilfs.cold.11+0x18/0x1d [nilfs2] nilfs_mount+0x9b5/0x12b0 [nilfs2] ... This fixes the issue by adding and using a new helper function for getting block size with sanity check.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "fs/nilfs2/the_nilfs.c"
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix shift-out-of-bounds due to too large exponent of block size\n\nIf field s_log_block_size of superblock data is corrupted and too large,\ninit_nilfs() and load_nilfs() still can trigger a shift-out-of-bounds\nwarning followed by a kernel panic (if panic_on_warn is set):\n\n shift exponent 38973 is too large for 32-bit type \u0027int\u0027\n Call Trace:\n  \u003cTASK\u003e\n  dump_stack_lvl+0xcd/0x134\n  ubsan_epilogue+0xb/0x50\n  __ubsan_handle_shift_out_of_bounds.cold.12+0x17b/0x1f5\n  init_nilfs.cold.11+0x18/0x1d [nilfs2]\n  nilfs_mount+0x9b5/0x12b0 [nilfs2]\n  ...\n\nThis fixes the issue by adding and using a new helper function for getting\nblock size with sanity check."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-30T12:15:36.489Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/ebeccaaef67a4895d2496ab8d9c2fb8d89201211"
        }
      ],
      "title": "nilfs2: fix shift-out-of-bounds due to too large exponent of block size",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50864",
    "datePublished": "2025-12-30T12:15:36.489Z",
    "dateReserved": "2025-12-30T12:06:07.135Z",
    "dateUpdated": "2025-12-30T12:15:36.489Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50864\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-30T13:16:01.207\",\"lastModified\":\"2025-12-30T13:16:01.207\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnilfs2: fix shift-out-of-bounds due to too large exponent of block size\\n\\nIf field s_log_block_size of superblock data is corrupted and too large,\\ninit_nilfs() and load_nilfs() still can trigger a shift-out-of-bounds\\nwarning followed by a kernel panic (if panic_on_warn is set):\\n\\n shift exponent 38973 is too large for 32-bit type \u0027int\u0027\\n Call Trace:\\n  \u003cTASK\u003e\\n  dump_stack_lvl+0xcd/0x134\\n  ubsan_epilogue+0xb/0x50\\n  __ubsan_handle_shift_out_of_bounds.cold.12+0x17b/0x1f5\\n  init_nilfs.cold.11+0x18/0x1d [nilfs2]\\n  nilfs_mount+0x9b5/0x12b0 [nilfs2]\\n  ...\\n\\nThis fixes the issue by adding and using a new helper function for getting\\nblock size with sanity check.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/8b6ef451b5701b37d9a5905534595776a662edfc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a16731fa1b96226c75bbf18e73513b14fc318360\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ddb6615a168f97b91175e00eda4c644741cf531c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ebeccaaef67a4895d2496ab8d9c2fb8d89201211\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ec93b5430ec0f60877a5388bb023d60624f9ab9f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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