{
  "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-2022-49077",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49077",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-02-26T01:54:39.739Z",
    "updatedAt": "2026-05-11T18:52:34.901Z",
    "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": "mmmremap.c: avoid pointless invalidate_range_start/end on mremap(old_size=0)",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nmmmremap.c: avoid pointless invalidate_range_start/end on mremap(old_size=0)\n\nIf an mremap() syscall with old_size=0 ends up in move_page_tables(), it\nwill call invalidate_range_start()/invalidate_range_end() unnecessarily,\ni.e.  with an empty range.\n\nThis causes a WARN in KVM's mmu_notifier.  In the past, empty ranges\nhave been diagnosed to be off-by-one bugs, hence the WARNing.  Given the\nlow (so far) number of unique reports, the benefits of detecting more\nbuggy callers seem to outweigh the cost of having to fix cases such as\nthis one, where userspace is doing something silly.  In this particular\ncase, an early return from move_page_tables() is enough to fix the\nissue.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a05540f3903bd8295e8c4cd90dd3d416239a115b"
            },
            {
              "version": "7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "eeaf28e2a0128147d687237e59d5407ee1b14693"
            },
            {
              "version": "7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e2c328c2a8f9de8b761bd4025b66c63120c55761"
            },
            {
              "version": "7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c19d8de4e682ec4b0ea2b04a832cd8cc0be3bb31"
            },
            {
              "version": "7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7d659cb1763ff17d1c6ee082fa6feb4267c7a30b"
            },
            {
              "version": "7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a04cb99c5d4668fe3f5c0e5b6da1cecd34c3f219"
            },
            {
              "version": "7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2358aa84ef6dafcf544a557caaa6b91afb4a0bd2"
            },
            {
              "version": "7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "04bc13dae4a27b8d030843c85ae452bb2f1d9c1f"
            },
            {
              "version": "7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "01e67e04c28170c47700c2c226d732bbfedb1ad0"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.2",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.2"
            },
            {
              "version": "4.9.311",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.9.*"
            },
            {
              "version": "4.14.276",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.238",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.189",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.111",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.34",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "5.16.20",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.16.*"
            },
            {
              "version": "5.17.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.17.*"
            },
            {
              "version": "5.18",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}