GHSA-H3C9-8XWQ-2J95

Vulnerability from github – Published: 2024-07-29 18:30 – Updated: 2025-11-04 00:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

ftruncate: pass a signed offset

The old ftruncate() syscall, using the 32-bit off_t misses a sign extension when called in compat mode on 64-bit architectures. As a result, passing a negative length accidentally succeeds in truncating to file size between 2GiB and 4GiB.

Changing the type of the compat syscall to the signed compat_off_t changes the behavior so it instead returns -EINVAL.

The native entry point, the truncate() syscall and the corresponding loff_t based variants are all correct already and do not suffer from this mistake.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
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{
  "affected": [],
  "aliases": [
    "CVE-2024-42084"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-29T17:15:11Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nftruncate: pass a signed offset\n\nThe old ftruncate() syscall, using the 32-bit off_t misses a sign\nextension when called in compat mode on 64-bit architectures.  As a\nresult, passing a negative length accidentally succeeds in truncating\nto file size between 2GiB and 4GiB.\n\nChanging the type of the compat syscall to the signed compat_off_t\nchanges the behavior so it instead returns -EINVAL.\n\nThe native entry point, the truncate() syscall and the corresponding\nloff_t based variants are all correct already and do not suffer\nfrom this mistake.",
  "id": "GHSA-h3c9-8xwq-2j95",
  "modified": "2025-11-04T00:31:05Z",
  "published": "2024-07-29T18:30:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-42084"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b8e88e563b5f666446d002ad0dc1e6e8e7102b0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ae6af68410bdad6181ec82104bb9985a7a6a0fa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/836359247b0403e0634bfbc83e5bb8063fad287a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/84bf6b64a1a0dfc6de7e1b1c776d58d608e7865a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/930a4c369f74da26816eaaa71b5888d29b759c27"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c329760749b5419769e57cb2be80955d2805f9c9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dbb226d81cd02cee140139c2369791e6f61f2007"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f531d4bc6c5588d713359e42ed65e46816d841d8"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}


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