CVE-2026-45935 (GCVE-0-2026-45935)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:17 – Updated: 2026-05-27 12:17
VLAI
Title
fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot
Summary
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot In the 'DeleteIndexEntryRoot' case of the 'do_action' function, the entry size ('esize') is retrieved from the log record without adequate bounds checking. Specifically, the code calculates the end of the entry ('e2') using: e2 = Add2Ptr(e1, esize); It then calculates the size for memmove using 'PtrOffset(e2, ...)', which subtracts the end pointer from the buffer limit. If 'esize' is maliciously large, 'e2' exceeds the used buffer size. This results in a negative offset which, when cast to size_t for memmove, interprets as a massive unsigned integer, leading to a heap buffer overflow. This commit adds a check to ensure that the entry size ('esize') strictly fits within the remaining used space of the index header before performing memory operations.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < 36c03f7f177b34d51f1cf1d2304b1074607bf4b0 (git)
Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < b271c9cb85927210b1b799e55ee7f702d12b4336 (git)
Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < a584b9d1059b29e97e17c919274e9adfb846f2a0 (git)
Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < c065541b71b79874c83d418a9acd18ad5826339b (git)
Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < 78942172d5bff4d4afed8674abc09cc560ce44a0 (git)
Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < f3b437a4c3e022a1449658ae9f3dd34859894513 (git)
Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < b2bc7c44ed1779fc9eaab9a186db0f0d01439622 (git)
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Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.14 , ≤ 6.18.* (semver)
Unaffected: 6.19.4 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot\n\nIn the \u0027DeleteIndexEntryRoot\u0027 case of the \u0027do_action\u0027 function, the\nentry size (\u0027esize\u0027) is retrieved from the log record without adequate\nbounds checking.\n\nSpecifically, the code calculates the end of the entry (\u0027e2\u0027) using:\n    e2 = Add2Ptr(e1, esize);\n\nIt then calculates the size for memmove using \u0027PtrOffset(e2, ...)\u0027,\nwhich subtracts the end pointer from the buffer limit. If \u0027esize\u0027 is\nmaliciously large, \u0027e2\u0027 exceeds the used buffer size. This results in\na negative offset which, when cast to size_t for memmove, interprets\nas a massive unsigned integer, leading to a heap buffer overflow.\n\nThis commit adds a check to ensure that the entry size (\u0027esize\u0027) strictly\nfits within the remaining used space of the index header before performing\nmemory operations."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:17:52.705Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "dateReserved": "2026-05-13T15:03:33.086Z",
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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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.