{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2022-50086",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-50086",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-06-18T11:02:27.283Z",
    "updatedAt": "2026-05-11T19:12:33.587Z",
    "importedAt": "2026-10-24T01:56:49.724Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "block: don't allow the same type rq_qos add more than once",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: don't allow the same type rq_qos add more than once\n\nIn our test of iocost, we encountered some list add/del corruptions of\ninner_walk list in ioc_timer_fn.\n\nThe reason can be described as follows:\n\ncpu 0\t\t\t\t\tcpu 1\nioc_qos_write\t\t\t\tioc_qos_write\n\nioc = q_to_ioc(queue);\nif (!ioc) {\n        ioc = kzalloc();\n\t\t\t\t\tioc = q_to_ioc(queue);\n\t\t\t\t\tif (!ioc) {\n\t\t\t\t\t\tioc = kzalloc();\n\t\t\t\t\t\t...\n\t\t\t\t\t\trq_qos_add(q, rqos);\n\t\t\t\t\t}\n        ...\n        rq_qos_add(q, rqos);\n        ...\n}\n\nWhen the io.cost.qos file is written by two cpus concurrently, rq_qos may\nbe added to one disk twice. In that case, there will be two iocs enabled\nand running on one disk. They own different iocgs on their active list. In\nthe ioc_timer_fn function, because of the iocgs from two iocs have the\nsame root iocg, the root iocg's walk_list may be overwritten by each other\nand this leads to list add/del corruptions in building or destroying the\ninner_walk list.\n\nAnd so far, the blk-rq-qos framework works in case that one instance for\none type rq_qos per queue by default. This patch make this explicit and\nalso fix the crash above.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "a79050434b45959f397042080fd1d70ffa9bd9df",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0b7f5d7a4d2a72ad9de04ab8ccba2a31904aa638"
            },
            {
              "version": "a79050434b45959f397042080fd1d70ffa9bd9df",
              "status": "affected",
              "versionType": "git",
              "lessThan": "08ef66e800a85afc6b54cb95841f6502627eee2e"
            },
            {
              "version": "a79050434b45959f397042080fd1d70ffa9bd9df",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0c9bb1acd1d103a3070b2126870eb52761d606ce"
            },
            {
              "version": "a79050434b45959f397042080fd1d70ffa9bd9df",
              "status": "affected",
              "versionType": "git",
              "lessThan": "14a6e2eb7df5c7897c15b109cba29ab0c4a791b6"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.19",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.19"
            },
            {
              "version": "5.15.61",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "5.18.18",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.18.*"
            },
            {
              "version": "5.19.2",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.19.*"
            },
            {
              "version": "6.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}