fkie_cve-2021-47504
Vulnerability from fkie_nvd
Published
2024-05-24 15:15
Modified
2025-09-29 16:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: io_uring: ensure task_work gets run as part of cancelations If we successfully cancel a work item but that work item needs to be processed through task_work, then we can be sleeping uninterruptibly in io_uring_cancel_generic() and never process it. Hence we don't make forward progress and we end up with an uninterruptible sleep warning. While in there, correct a comment that should be IFF, not IIF.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/78a780602075d8b00c98070fa26e389b3b3efa72Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8e12976c0c19ebc14b60046b1348c516a74c25a2Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/78a780602075d8b00c98070fa26e389b3b3efa72Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8e12976c0c19ebc14b60046b1348c516a74c25a2Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 5.16
linux linux_kernel 5.16
linux linux_kernel 5.16
linux linux_kernel 5.16


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FBD4E5C8-D9DB-4544-9E63-A00C38342301",
              "versionEndExcluding": "5.15.8",
              "versionStartIncluding": "5.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "357AA433-37E8-4323-BFB2-3038D6E4B414",
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              "vulnerable": true
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              "matchCriteriaId": "F7BFDCAA-1650-49AA-8462-407DD593F94F",
              "vulnerable": true
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          ],
          "negate": false,
          "operator": "OR"
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      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: ensure task_work gets run as part of cancelations\n\nIf we successfully cancel a work item but that work item needs to be\nprocessed through task_work, then we can be sleeping uninterruptibly\nin io_uring_cancel_generic() and never process it. Hence we don\u0027t\nmake forward progress and we end up with an uninterruptible sleep\nwarning.\n\nWhile in there, correct a comment that should be IFF, not IIF."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: io_uring: garantiza que task_work se ejecute como parte de las cancelaciones. Si cancelamos con \u00e9xito un elemento de trabajo pero ese elemento de trabajo debe procesarse a trav\u00e9s de task_work, entonces podemos estar durmiendo ininterrumpidamente en io_uring_cancel_generic() y nunca procesarlo. Por lo tanto, no avanzamos y terminamos con un aviso de sue\u00f1o ininterrumpido. Mientras est\u00e9 all\u00ed, corrija un comentario que deber\u00eda ser IFF, no IIF."
    }
  ],
  "id": "CVE-2021-47504",
  "lastModified": "2025-09-29T16:31:01.823",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-05-24T15:15:10.773",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/78a780602075d8b00c98070fa26e389b3b3efa72"
    },
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    },
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
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    }
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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