{
  "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-2022-49556",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49556",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-02-26T02:14:03.630Z",
    "updatedAt": "2026-05-11T19:02:13.907Z",
    "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": "KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak\n\nFor some sev ioctl interfaces, the length parameter that is passed maybe\nless than or equal to SEV_FW_BLOB_MAX_SIZE, but larger than the data\nthat PSP firmware returns. In this case, kmalloc will allocate memory\nthat is the size of the input rather than the size of the data.\nSince PSP firmware doesn't fully overwrite the allocated buffer, these\nsev ioctl interface may return uninitialized kernel slab memory.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "401bef1f95de92c3a8c6eece46e02fa88d7285ee"
            },
            {
              "version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d8fdb4b24097472ff6b3c0559448200d420b1418"
            },
            {
              "version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bbdcc644b59e01e98c68894a9fab42b9687f42b0"
            },
            {
              "version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "57a01725339f9d82b099102ba2751621b1caab93"
            },
            {
              "version": "eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d22d2474e3953996f03528b84b7f52cc26a39403"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.7",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.7"
            },
            {
              "version": "5.10.124",
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}