Vulnerability-Lookup

FKIE_CVE-2026-46294

Vulnerability from fkie_nvd - Published: 2026-06-08 17:16 - Updated: 2026-07-23 08:10

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: fix a buffer overflow in ioctl processing Tony Asleson (using Claude) found a buffer overflow in dm-ioctl in the function retrieve_status: 1. The code in retrieve_status checks that the output string fits into the output buffer and writes the output string there 2. Then, the code aligns the "outptr" variable to the next 8-byte boundary: outptr = align_ptr(outptr); 3. The alignment doesn't check overflow, so outptr could point past the buffer end 4. The "for" loop is iterated again, it executes: remaining = len - (outptr - outbuf); 5. If "outptr" points past "outbuf + len", the arithmetics wraps around and the variable "remaining" contains unusually high number 6. With "remaining" being high, the code writes more data past the end of the buffer Luckily, this bug has no security implications because: 1. Only root can issue device mapper ioctls 2. The commonly used libraries that communicate with device mapper (libdevmapper and devicemapper-rs) use buffer size that is aligned to 8 bytes - thus, "outptr = align_ptr(outptr)" can't overshoot the input buffer and the bug can't happen accidentally

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2fa49cc884f6496a915c35621ba4da35649bf159	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/448ee8fb79c26a26599ffa4b2adeb4322d3d3d8c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/526ff9126a0ae087b65726e1faf31114c718020d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5af6a879e915ae7bcd83695c316ebb32e1c61bc2	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8daa6c708ef524089ae43f2aed9190acb26d7df8	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c8c5311237448f6ffeecc9aec2362e3692623668	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d271631023cbe1cbe7c31a0275ab797883be6e0a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f0b0b09d9840838ae77ccdd6a62de0daef4e6e0a	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12

JSON

To clipboard

{
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      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-ioctl.c"
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              "version": "2.6.12"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
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              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.1.175",
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              "version": "6.12.88",
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.30",
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              "version": "7.0.7",
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        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
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          "negate": false,
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      ]
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm: fix a buffer overflow in ioctl processing\n\nTony Asleson (using Claude) found a buffer overflow in dm-ioctl in the\nfunction retrieve_status:\n\n1. The code in retrieve_status checks that the output string fits into\n   the output buffer and writes the output string there\n2. Then, the code aligns the \"outptr\" variable to the next 8-byte\n   boundary:\n\toutptr = align_ptr(outptr);\n3. The alignment doesn\u0027t check overflow, so outptr could point past the\n   buffer end\n4. The \"for\" loop is iterated again, it executes:\n\tremaining = len - (outptr - outbuf);\n5. If \"outptr\" points past \"outbuf + len\", the arithmetics wraps around\n   and the variable \"remaining\" contains unusually high number\n6. With \"remaining\" being high, the code writes more data past the end of\n   the buffer\n\nLuckily, this bug has no security implications because:\n1. Only root can issue device mapper ioctls\n2. The commonly used libraries that communicate with device mapper\n   (libdevmapper and devicemapper-rs) use buffer size that is aligned to\n   8 bytes - thus, \"outptr = align_ptr(outptr)\" can\u0027t overshoot the input\n   buffer and the bug can\u0027t happen accidentally"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndm: corrige un desbordamiento de b\u00fafer en el procesamiento de ioctl\n\nTony Asleson (usando Claude) encontr\u00f3 un desbordamiento de b\u00fafer en dm-ioctl en la funci\u00f3n retrieve_status:\n\n1. El c\u00f3digo en retrieve_status verifica que la cadena de salida cabe en el b\u00fafer de salida y escribe la cadena de salida all\u00ed\n2. Luego, el c\u00f3digo alinea la variable \u0027outptr\u0027 al siguiente l\u00edmite de 8 bytes:\n\toutptr = align_ptr(outptr);\n3. La alineaci\u00f3n no verifica el desbordamiento, por lo que \u0027outptr\u0027 podr\u00eda apuntar m\u00e1s all\u00e1 del final del b\u00fafer\n4. El bucle \u0027for\u0027 se itera de nuevo, ejecuta:\n\tremaining = len - (outptr - outbuf);\n5. Si \u0027outptr\u0027 apunta m\u00e1s all\u00e1 de \u0027outbuf + len\u0027, la aritm\u00e9tica se desborda y la variable \u0027remaining\u0027 contiene un n\u00famero inusualmente alto\n6. Siendo \u0027remaining\u0027 alto, el c\u00f3digo escribe m\u00e1s datos m\u00e1s all\u00e1 del final del b\u00fafer\n\nAfortunadamente, este error no tiene implicaciones de seguridad porque:\n1. Solo root puede emitir ioctls del mapeador de dispositivos\n2. Las bibliotecas com\u00fanmente utilizadas que se comunican con el mapeador de dispositivos (libdevmapper y devicemapper-rs) usan un tama\u00f1o de b\u00fafer que est\u00e1 alineado a 8 bytes; por lo tanto, \u0027outptr = align_ptr(outptr)\u0027 no puede exceder el b\u00fafer de entrada y el error no puede ocurrir accidentalmente"
    }
  ],
  "id": "CVE-2026-46294",
  "lastModified": "2026-07-23T08:10:00.137",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-06-08T17:16:47.757",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/2fa49cc884f6496a915c35621ba4da35649bf159"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/448ee8fb79c26a26599ffa4b2adeb4322d3d3d8c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/526ff9126a0ae087b65726e1faf31114c718020d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/5af6a879e915ae7bcd83695c316ebb32e1c61bc2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/8daa6c708ef524089ae43f2aed9190acb26d7df8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c8c5311237448f6ffeecc9aec2362e3692623668"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d271631023cbe1cbe7c31a0275ab797883be6e0a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/f0b0b09d9840838ae77ccdd6a62de0daef4e6e0a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-46294 (GCVE-0-2026-46294)

Vulnerability from cvelistv5 – Published: 2026-06-08 15:46 – Updated: 2026-06-14 18:07

Title

dm: fix a buffer overflow in ioctl processing

Summary

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/c8c5311237448f6ff…
https://git.kernel.org/stable/c/448ee8fb79c26a265…
https://git.kernel.org/stable/c/526ff9126a0ae087b…
https://git.kernel.org/stable/c/f0b0b09d9840838ae…
https://git.kernel.org/stable/c/d271631023cbe1cbe…
https://git.kernel.org/stable/c/5af6a879e915ae7bc…
https://git.kernel.org/stable/c/8daa6c708ef524089…
https://git.kernel.org/stable/c/2fa49cc884f6496a9…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c8c5311237448f6ffeecc9aec2362e3692623668 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 448ee8fb79c26a26599ffa4b2adeb4322d3d3d8c (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 526ff9126a0ae087b65726e1faf31114c718020d (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f0b0b09d9840838ae77ccdd6a62de0daef4e6e0a (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d271631023cbe1cbe7c31a0275ab797883be6e0a (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5af6a879e915ae7bcd83695c316ebb32e1c61bc2 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8daa6c708ef524089ae43f2aed9190acb26d7df8 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2fa49cc884f6496a915c35621ba4da35649bf159 (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-ioctl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c8c5311237448f6ffeecc9aec2362e3692623668",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "448ee8fb79c26a26599ffa4b2adeb4322d3d3d8c",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "526ff9126a0ae087b65726e1faf31114c718020d",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
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              "versionType": "git"
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              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
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              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-ioctl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.88",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.30",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.258",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.209",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.175",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.140",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.88",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.30",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.7",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm: fix a buffer overflow in ioctl processing\n\nTony Asleson (using Claude) found a buffer overflow in dm-ioctl in the\nfunction retrieve_status:\n\n1. The code in retrieve_status checks that the output string fits into\n   the output buffer and writes the output string there\n2. Then, the code aligns the \"outptr\" variable to the next 8-byte\n   boundary:\n\toutptr = align_ptr(outptr);\n3. The alignment doesn\u0027t check overflow, so outptr could point past the\n   buffer end\n4. The \"for\" loop is iterated again, it executes:\n\tremaining = len - (outptr - outbuf);\n5. If \"outptr\" points past \"outbuf + len\", the arithmetics wraps around\n   and the variable \"remaining\" contains unusually high number\n6. With \"remaining\" being high, the code writes more data past the end of\n   the buffer\n\nLuckily, this bug has no security implications because:\n1. Only root can issue device mapper ioctls\n2. The commonly used libraries that communicate with device mapper\n   (libdevmapper and devicemapper-rs) use buffer size that is aligned to\n   8 bytes - thus, \"outptr = align_ptr(outptr)\" can\u0027t overshoot the input\n   buffer and the bug can\u0027t happen accidentally"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T18:07:06.194Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c8c5311237448f6ffeecc9aec2362e3692623668"
        },
        {
          "url": "https://git.kernel.org/stable/c/448ee8fb79c26a26599ffa4b2adeb4322d3d3d8c"
        },
        {
          "url": "https://git.kernel.org/stable/c/526ff9126a0ae087b65726e1faf31114c718020d"
        },
        {
          "url": "https://git.kernel.org/stable/c/f0b0b09d9840838ae77ccdd6a62de0daef4e6e0a"
        },
        {
          "url": "https://git.kernel.org/stable/c/d271631023cbe1cbe7c31a0275ab797883be6e0a"
        },
        {
          "url": "https://git.kernel.org/stable/c/5af6a879e915ae7bcd83695c316ebb32e1c61bc2"
        },
        {
          "url": "https://git.kernel.org/stable/c/8daa6c708ef524089ae43f2aed9190acb26d7df8"
        },
        {
          "url": "https://git.kernel.org/stable/c/2fa49cc884f6496a915c35621ba4da35649bf159"
        }
      ],
      "title": "dm: fix a buffer overflow in ioctl processing",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46294",
    "datePublished": "2026-06-08T15:46:21.401Z",
    "dateReserved": "2026-05-13T15:03:33.110Z",
    "dateUpdated": "2026-06-14T18:07:06.194Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

FKIE_CVE-2026-46294

CVE-2026-46294 (GCVE-0-2026-46294)

Tags

Sightings

Nomenclature