fkie_cve-2022-49044
Vulnerability from fkie_nvd
Published
2025-02-26 07:00
Modified
2025-09-23 18:24
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/08c1af8f1c13bbf210f1760132f4df24d0ed46d6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4d485cf9b609709e45d5113e6e2b1b01254b2fe9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6a95d91c0b315c965198f6ab7dec7c94129e17e0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6b4bf97587ef6c1927a78934b700204920655123Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7f84c937222944c03f4615ca4742df6bed0e5adfPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cd02b2687d66f0a8e716384de4b9a0671331f1dcPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.18
linux linux_kernel 5.18


To clipboard 

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  "cveTags": [],
  "descriptions": [
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      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dm integrity: fix memory corrupts when tag_size is less than digest size Es posible configurar dm-integrity de tal manera que el par\u00e1metro \"tag_size\" sea menor que el tama\u00f1o real del resumen. En esta situaci\u00f3n, se ignora una parte del resumen m\u00e1s all\u00e1 de tag_size. En este caso, dm-integrity escribir\u00eda m\u00e1s all\u00e1 del final de la matriz ic-\u0026gt;recalc_tags y da\u00f1ar\u00eda la memoria. La corrupci\u00f3n ocurri\u00f3 en integrity_recalc-\u0026gt;integrity_sector_checksum-\u0026gt;crypto_shash_final. Corrija esta corrupci\u00f3n aumentando la matriz tags para que tenga suficiente relleno al final para acomodar el bucle en integrity_recalc() pudiendo escribir un tama\u00f1o de resumen completo para el \u00faltimo miembro de la matriz tags."
    }
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  "id": "CVE-2022-49044",
  "lastModified": "2025-09-23T18:24:48.823",
  "metrics": {
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
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        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2025-02-26T07:00:41.680",
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  "vulnStatus": "Analyzed",
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          "lang": "en",
          "value": "CWE-787"
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      "source": "nvd@nist.gov",
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}


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