FKIE_CVE-2022-49694

Vulnerability from fkie_nvd - Published: 2025-02-26 07:01 - Updated: 2026-06-17 05:18
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: block: disable the elevator int del_gendisk The elevator is only used for file system requests, which are stopped in del_gendisk. Move disabling the elevator and freeing the scheduler tags to the end of del_gendisk instead of doing that work in disk_release and blk_cleanup_queue to avoid a use after free on q->tag_set from disk_release as the tag_set might not be alive at that point. Move the blk_qos_exit call as well, as it just depends on the elevator exit and would be the only reason to keep the not exactly cheap queue freeze in disk_release.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/50e34d78815e474d410f342fbe783b18192ca518Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f28699fafc047ec33299da01e928c3a0073c5cc6Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 5.19
linux linux_kernel 5.19
linux linux_kernel 5.19
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "block/blk-core.c",
            "block/genhd.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f28699fafc047ec33299da01e928c3a0073c5cc6",
              "status": "affected",
              "version": "e155b0c238b20f0a866f4334d292656665836c8a",
              "versionType": "git"
            },
            {
              "lessThan": "50e34d78815e474d410f342fbe783b18192ca518",
              "status": "affected",
              "version": "e155b0c238b20f0a866f4334d292656665836c8a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "block/blk-core.c",
            "block/genhd.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
              "lessThan": "5.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0172D3FA-DDEB-482A-A270-4A1495A8798C",
              "versionEndExcluding": "5.18.8",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "A8C30C2D-F82D-4D37-AB48-D76ABFBD5377",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "BF8547FC-C849-4F1B-804B-A93AE2F04A92",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "F3068028-F453-4A1C-B80F-3F5609ACEF60",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: disable the elevator int del_gendisk\n\nThe elevator is only used for file system requests, which are stopped in\ndel_gendisk.  Move disabling the elevator and freeing the scheduler tags\nto the end of del_gendisk instead of doing that work in disk_release and\nblk_cleanup_queue to avoid a use after free on q-\u003etag_set from\ndisk_release as the tag_set might not be alive at that point.\n\nMove the blk_qos_exit call as well, as it just depends on the elevator\nexit and would be the only reason to keep the not exactly cheap queue\nfreeze in disk_release."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: block: deshabilitar el elevador int del_gendisk El elevador solo se usa para solicitudes del sistema de archivos, que se detienen en del_gendisk. Mueva la desactivaci\u00f3n del elevador y la liberaci\u00f3n de las etiquetas del programador al final de del_gendisk en lugar de hacer ese trabajo en disk_release y blk_cleanup_queue para evitar un use-after-free en q-\u0026gt;tag_set desde disk_release ya que tag_set podr\u00eda no estar activo en ese punto. Mueva tambi\u00e9n la llamada blk_qos_exit, ya que solo depende de la salida del elevador y ser\u00eda la \u00fanica raz\u00f3n para mantener la congelaci\u00f3n de la cola no exactamente barata en disk_release."
    }
  ],
  "id": "CVE-2022-49694",
  "lastModified": "2026-06-17T05:18:52.880",
  "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-49694",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-03-05T21:16:23.386514Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-02-26T07:01:44.170",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/50e34d78815e474d410f342fbe783b18192ca518"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/f28699fafc047ec33299da01e928c3a0073c5cc6"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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