CVE-2023-53222 (GCVE-0-2023-53222)
Vulnerability from cvelistv5
Published
2025-09-15 14:21
Modified
2026-08-05 09:13
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: jfs: jfs_dmap: Validate db_l2nbperpage while mounting In jfs_dmap.c at line 381, BLKTODMAP is used to get a logical block number inside dbFree(). db_l2nbperpage, which is the log2 number of blocks per page, is passed as an argument to BLKTODMAP which uses it for shifting. Syzbot reported a shift out-of-bounds crash because db_l2nbperpage is too big. This happens because the large value is set without any validation in dbMount() at line 181. Thus, make sure that db_l2nbperpage is correct while mounting. Max number of blocks per page = Page size / Min block size => log2(Max num_block per page) = log2(Page size / Min block size) = log2(Page size) - log2(Min block size) => Max db_l2nbperpage = L2PSIZE - L2MINBLOCKSIZE
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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    "datePublished": "2025-09-15T14:21:50.970Z",
    "dateReserved": "2025-09-15T14:19:21.845Z",
    "dateUpdated": "2026-08-05T09:13:10.735Z",
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\"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.40\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.4.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.4.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/jfs/jfs_dmap.c\", \"fs/jfs/jfs_filsys.h\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/8c1efe3f74a7864461b0dff281c5562154b4aa8e\"}, {\"url\": \"https://git.kernel.org/stable/c/ef5c205b6e6f8d1f18ef0b4a9832b1b5fa85f7f2\"}, {\"url\": \"https://git.kernel.org/stable/c/a4855aeb13e4ad1f23e16753b68212e180f7d848\"}, {\"url\": \"https://git.kernel.org/stable/c/47b7eaae08e8b2f25bdf37bc14d21be090bcb20f\"}, {\"url\": \"https://git.kernel.org/stable/c/de984faecddb900fa850af4df574a25b32bb93f5\"}, {\"url\": \"https://git.kernel.org/stable/c/c7feb54b113802d2aba98708769d3c33fb017254\"}, {\"url\": \"https://git.kernel.org/stable/c/2a03c4e683d33d17b667418eb717b13dda1fac6b\"}, {\"url\": \"https://git.kernel.org/stable/c/11509910c599cbd04585ec35a6d5e1a0053d84c1\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\njfs: jfs_dmap: Validate db_l2nbperpage while mounting\\n\\nIn jfs_dmap.c at line 381, BLKTODMAP is used to get a logical block\\nnumber inside dbFree(). db_l2nbperpage, which is the log2 number of\\nblocks per page, is passed as an argument to BLKTODMAP which uses it\\nfor shifting.\\n\\nSyzbot reported a shift out-of-bounds crash because db_l2nbperpage is\\ntoo big. This happens because the large value is set without any\\nvalidation in dbMount() at line 181.\\n\\nThus, make sure that db_l2nbperpage is correct while mounting.\\n\\nMax number of blocks per page = Page size / Min block size\\n=\u003e log2(Max num_block per page) = log2(Page size / Min block size)\\n\\t\\t\\t\\t= log2(Page size) - log2(Min block size)\\n\\n=\u003e Max db_l2nbperpage = L2PSIZE - L2MINBLOCKSIZE\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.322\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.291\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.251\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.188\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.121\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.40\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.4.5\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5\", \"versionStartIncluding\": \"2.6.12\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T09:13:10.735Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-53222\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T09:13:10.735Z\", \"dateReserved\": \"2025-09-15T14:19:21.845Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-15T14:21:50.970Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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