{
  "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-2021-47066",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47066",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-02-29T22:37:39.917Z",
    "updatedAt": "2026-08-05T08:45:48.517Z",
    "importedAt": "2026-10-24T01:56:36.661Z",
    "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": "async_xor: increase src_offs when dropping destination page",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nasync_xor: increase src_offs when dropping destination page\n\nNow we support sharing one page if PAGE_SIZE is not equal stripe size. To\nsupport this, it needs to support calculating xor value with different\noffsets for each r5dev. One offset array is used to record those offsets.\n\nIn RMW mode, parity page is used as a source page. It sets\nASYNC_TX_XOR_DROP_DST before calculating xor value in ops_run_prexor5.\nSo it needs to add src_list and src_offs at the same time. Now it only\nneeds src_list. So the xor value which is calculated is wrong. It can\ncause data corruption problem.\n\nI can reproduce this problem 100% on a POWER8 machine. The steps are:\n\n  mdadm -CR /dev/md0 -l5 -n3 /dev/sdb1 /dev/sdc1 /dev/sdd1 --size=3G\n  mkfs.xfs /dev/md0\n  mount /dev/md0 /mnt/test\n  mount: /mnt/test: mount(2) system call failed: Structure needs cleaning.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "29bcff787a2593b2126cfaff612c0b4e560022e9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cab2e8e5997b592fdb7d02cf2387b4b8e3057174"
            },
            {
              "version": "29bcff787a2593b2126cfaff612c0b4e560022e9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "29ffa50f33de824b5491f8239c88c4a0efdd03af"
            },
            {
              "version": "29bcff787a2593b2126cfaff612c0b4e560022e9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "53f8208e11abd6dde9480dfcb97fecdb1bc2ac18"
            },
            {
              "version": "29bcff787a2593b2126cfaff612c0b4e560022e9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ceaf2966ab082bbc4d26516f97b3ca8a676e2af8"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.10",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.10"
            },
            {
              "version": "5.10.37",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.11.21",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.11.*"
            },
            {
              "version": "5.12.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.12.*"
            },
            {
              "version": "5.13",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}