{
  "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-2022-49554",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49554",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-02-26T02:14:02.649Z",
    "updatedAt": "2026-10-15T21:21:07.734Z",
    "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": "zsmalloc: fix races between asynchronous zspage free and page migration",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nzsmalloc: fix races between asynchronous zspage free and page migration\n\nThe asynchronous zspage free worker tries to lock a zspage's entire page\nlist without defending against page migration.  Since pages which haven't\nyet been locked can concurrently migrate off the zspage page list while\nlock_zspage() churns away, lock_zspage() can suffer from a few different\nlethal races.\n\nIt can lock a page which no longer belongs to the zspage and unsafely\ndereference page_private(), it can unsafely dereference a torn pointer to\nthe next page (since there's a data race), and it can observe a spurious\nNULL pointer to the next page and thus not lock all of the zspage's pages\n(since a single page migration will reconstruct the entire page list, and\ncreate_page_chain() unconditionally zeroes out each list pointer in the\nprocess).\n\nFix the races by using migrate_read_lock() in lock_zspage() to synchronize\nwith page migration.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "77ff465799c60294e248000cd22ae8171da3304c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3674d8a8dadd03a447dd21069d4dacfc3399b63b"
            },
            {
              "version": "77ff465799c60294e248000cd22ae8171da3304c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "645996efc2ae391246d595832aaa6f9d3cc338c7"
            },
            {
              "version": "77ff465799c60294e248000cd22ae8171da3304c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fc658c083904427abbf8f18280d517ee2668677c"
            },
            {
              "version": "77ff465799c60294e248000cd22ae8171da3304c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fae05b2314b147a78fbed1dc4c645d9a66313758"
            },
            {
              "version": "77ff465799c60294e248000cd22ae8171da3304c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3ec459c8810e658401be428d3168eacfc380bdd0"
            },
            {
              "version": "77ff465799c60294e248000cd22ae8171da3304c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8ba7b7c1dad1f6503c541778f31b33f7f62eb966"
            },
            {
              "version": "77ff465799c60294e248000cd22ae8171da3304c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c5402fb5f71f1a725f1e55d9c6799c0c7bec308f"
            },
            {
              "version": "77ff465799c60294e248000cd22ae8171da3304c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2505a981114dcb715f8977b8433f7540854851d8"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.14",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.14"
            },
            {
              "version": "4.14.282",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.246",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.197",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.120",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.45",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "5.17.13",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.17.*"
            },
            {
              "version": "5.18.2",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.18.*"
            },
            {
              "version": "5.19",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}