GHSA-68XW-82J5-Q94C

Vulnerability from github – Published: 2025-09-23 18:30 – Updated: 2025-09-23 18:30
VLAI
Details

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

dm integrity: fix memory corruption when tag_size is less than digest size

It is possible to set up dm-integrity in such a way that the "tag_size" parameter is less than the actual digest size. In this situation, a part of the digest beyond tag_size is ignored.

In this case, dm-integrity would write beyond the end of the ic->recalc_tags array and corrupt memory. The corruption happened in integrity_recalc->integrity_sector_checksum->crypto_shash_final.

Fix this corruption by increasing the tags array so that it has enough padding at the end to accomodate the loop in integrity_recalc() being able to write a full digest size for the last member of the tags array.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2022-49044"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:00:41Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm integrity: fix memory corruption when tag_size is less than digest size\n\nIt is possible to set up dm-integrity in such a way that the\n\"tag_size\" parameter is less than the actual digest size. In this\nsituation, a part of the digest beyond tag_size is ignored.\n\nIn this case, dm-integrity would write beyond the end of the\nic-\u003erecalc_tags array and corrupt memory. The corruption happened in\nintegrity_recalc-\u003eintegrity_sector_checksum-\u003ecrypto_shash_final.\n\nFix this corruption by increasing the tags array so that it has enough\npadding at the end to accomodate the loop in integrity_recalc() being\nable to write a full digest size for the last member of the tags\narray.",
  "id": "GHSA-68xw-82j5-q94c",
  "modified": "2025-09-23T18:30:20Z",
  "published": "2025-09-23T18:30:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49044"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08c1af8f1c13bbf210f1760132f4df24d0ed46d6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4d485cf9b609709e45d5113e6e2b1b01254b2fe9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6a95d91c0b315c965198f6ab7dec7c94129e17e0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6b4bf97587ef6c1927a78934b700204920655123"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7f84c937222944c03f4615ca4742df6bed0e5adf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cd02b2687d66f0a8e716384de4b9a0671331f1dc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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