FKIE_CVE-2023-0240

Vulnerability from fkie_nvd - Published: 2023-01-30 14:15 - Updated: 2026-06-17 05:25
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
There is a logic error in io_uring's implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation. In the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161.
References
cve-coordination@google.comhttps://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y&id=788d0824269bef539fe31a785b1517882eafed93Mailing List, Patch, Vendor Advisory
cve-coordination@google.comhttps://github.com/gregkh/linux/commit/1e6fa5216a0e59ef02e8b6b40d553238a3b81d49Patch, Third Party Advisory
cve-coordination@google.comhttps://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y&id=788d0824269bef539fe31a785b1517882eafed93Mailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/gregkh/linux/commit/1e6fa5216a0e59ef02e8b6b40d553238a3b81d49Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20230316-0001/
Impacted products
Vendor Product Version
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageName": "io_uring",
          "product": "Linux Kernel",
          "repo": "https://git.kernel.org",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "5.10.161",
              "status": "affected",
              "version": "5.10",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "cve-coordination@google.com"
    },
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:o:linux:linux_kernel:5.10:-:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "product": "linux_kernel",
          "vendor": "linux",
          "versions": [
            {
              "lessThanOrEqual": "5.10.161",
              "status": "affected",
              "version": "5.10",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D61CA62B-157A-4415-B8FD-7C3C1208315D",
              "versionEndExcluding": "5.10",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "There is a logic error in io_uring\u0027s implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation.\n\nIn the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161."
    },
    {
      "lang": "es",
      "value": "Hay un error l\u00f3gico en la implementaci\u00f3n de io_uring que puede usarse para desencadenar una vulnerabilidad use-after-free que conduce a una escalada de privilegios. En la funci\u00f3n io_prep_async_work, la suposici\u00f3n de que la \u00faltima llamada a io_grab_identity no puede devolver falso no es cierta y, en este caso, la funci\u00f3n utilizar\u00e1 la identidad init_cred o las solicitudes vinculadas anteriores para realizar operaciones en lugar de utilizar la identidad actual. Esto puede provocar problemas de recuento de referencias que provoquen Use-After-Free. Recomendamos actualizar a la versi\u00f3n anterior 5.10.161."
    }
  ],
  "id": "CVE-2023-0240",
  "lastModified": "2026-06-17T05:25:06.073",
  "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": "cve-coordination@google.com",
        "type": "Secondary"
      },
      {
        "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"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-0240",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-08-01T18:22:24.961145Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2023-01-30T14:15:10.403",
  "references": [
    {
      "source": "cve-coordination@google.com",
      "tags": [
        "Mailing List",
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y\u0026id=788d0824269bef539fe31a785b1517882eafed93"
    },
    {
      "source": "cve-coordination@google.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/gregkh/linux/commit/1e6fa5216a0e59ef02e8b6b40d553238a3b81d49"
    },
    {
      "source": "cve-coordination@google.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y\u0026id=788d0824269bef539fe31a785b1517882eafed93"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/gregkh/linux/commit/1e6fa5216a0e59ef02e8b6b40d553238a3b81d49"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://security.netapp.com/advisory/ntap-20230316-0001/"
    }
  ],
  "sourceIdentifier": "cve-coordination@google.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "cve-coordination@google.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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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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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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