CVE-2023-53222 (GCVE-0-2023-53222)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:21 – Updated: 2026-01-14 17:52
VLAI?
Title
jfs: jfs_dmap: Validate db_l2nbperpage while mounting
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
Severity ?
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8c1efe3f74a7864461b0dff281c5562154b4aa8e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ef5c205b6e6f8d1f18ef0b4a9832b1b5fa85f7f2 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a4855aeb13e4ad1f23e16753b68212e180f7d848 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 47b7eaae08e8b2f25bdf37bc14d21be090bcb20f (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < de984faecddb900fa850af4df574a25b32bb93f5 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c7feb54b113802d2aba98708769d3c33fb017254 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2a03c4e683d33d17b667418eb717b13dda1fac6b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 11509910c599cbd04585ec35a6d5e1a0053d84c1 (git)
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    Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 4.14.322 , ≤ 4.14.* (semver)
Unaffected: 4.19.291 , ≤ 4.19.* (semver)
Unaffected: 5.4.251 , ≤ 5.4.* (semver)
Unaffected: 5.10.188 , ≤ 5.10.* (semver)
Unaffected: 5.15.121 , ≤ 5.15.* (semver)
Unaffected: 6.1.40 , ≤ 6.1.* (semver)
Unaffected: 6.4.5 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
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\"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\": \"2026-01-05T10:18:47.469Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-53222\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-14T17:52:59.269Z\", \"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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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.