CVE-2022-49762 (GCVE-0-2022-49762)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:09 – Updated: 2025-12-23 13:25
VLAI?
Title
ntfs: check overflow when iterating ATTR_RECORDs
Summary
In the Linux kernel, the following vulnerability has been resolved: ntfs: check overflow when iterating ATTR_RECORDs Kernel iterates over ATTR_RECORDs in mft record in ntfs_attr_find(). Because the ATTR_RECORDs are next to each other, kernel can get the next ATTR_RECORD from end address of current ATTR_RECORD, through current ATTR_RECORD length field. The problem is that during iteration, when kernel calculates the end address of current ATTR_RECORD, kernel may trigger an integer overflow bug in executing `a = (ATTR_RECORD*)((u8*)a + le32_to_cpu(a->length))`. This may wrap, leading to a forever iteration on 32bit systems. This patch solves it by adding some checks on calculating end address of current ATTR_RECORD during iteration.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5559eb5809353a83a40a1e4e7f066431c7b83020 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 86f36de14dce5802856bb7a5921d74439db00b64 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 45683723f6b53e39e8a4cec0894e61fd6ec71989 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b612f924f296408d7d02fb4cd01218afd4ed7184 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 957732a09c3828267c2819d31c425aa793dd475b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b63ddb3ba61e2d3539f87e095c881e552bc45dab (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 785b2af9654b8beac55644e36da0085c5d776361 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 63095f4f3af59322bea984a6ae44337439348fe0 (git)
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    Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 4.9.334 , ≤ 4.9.* (semver)
Unaffected: 4.14.300 , ≤ 4.14.* (semver)
Unaffected: 4.19.267 , ≤ 4.19.* (semver)
Unaffected: 5.4.225 , ≤ 5.4.* (semver)
Unaffected: 5.10.156 , ≤ 5.10.* (semver)
Unaffected: 5.15.80 , ≤ 5.15.* (semver)
Unaffected: 6.0.10 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: check overflow when iterating ATTR_RECORDs\n\nKernel iterates over ATTR_RECORDs in mft record in ntfs_attr_find(). \nBecause the ATTR_RECORDs are next to each other, kernel can get the next\nATTR_RECORD from end address of current ATTR_RECORD, through current\nATTR_RECORD length field.\n\nThe problem is that during iteration, when kernel calculates the end\naddress of current ATTR_RECORD, kernel may trigger an integer overflow bug\nin executing `a = (ATTR_RECORD*)((u8*)a + le32_to_cpu(a-\u003elength))`.  This\nmay wrap, leading to a forever iteration on 32bit systems.\n\nThis patch solves it by adding some checks on calculating end address\nof current ATTR_RECORD during iteration."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-23T13:25:36.849Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/86f36de14dce5802856bb7a5921d74439db00b64"
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        {
          "url": "https://git.kernel.org/stable/c/63095f4f3af59322bea984a6ae44337439348fe0"
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      "title": "ntfs: check overflow when iterating ATTR_RECORDs",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49762",
    "datePublished": "2025-05-01T14:09:02.952Z",
    "dateReserved": "2025-03-27T16:39:17.990Z",
    "dateUpdated": "2025-12-23T13:25:36.849Z",
    "state": "PUBLISHED"
  },
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}


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