{
  "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-2026-80554",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-80554",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-26T14:37:22.376Z",
    "updatedAt": "2026-10-16T19:26:26.790Z",
    "importedAt": "2026-10-24T01:58:30.346Z",
    "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": "s390/vfio_ccw: Limit the number of channel program segments",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/vfio_ccw: Limit the number of channel program segments\n\nThe processing of channel programs, and the CCWs within them, is done\nrecursively. As such, there is an arbitrary (but not architectural)\nlimit to the number of CCWs that can exist in a single channel program.\n\nThe vfio-ccw logic breaks these channel programs into segments whenever\nit encounters a Transfer-In-Channel (TIC) CCW, and the combined number\nof segments count towards the global limit. Impose an equivalent limit\nto the number of segments until such logic can be made non-recursive.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0a19e61e6d4c6192077ead760ba0a2d350987d4c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "15fb4559a7fdf0b8725e433a71cfd03a1313a48b"
            },
            {
              "version": "0a19e61e6d4c6192077ead760ba0a2d350987d4c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a1625f66eaa1200068a0e2c05bc90e65182fc4e3"
            },
            {
              "version": "0a19e61e6d4c6192077ead760ba0a2d350987d4c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "06f4d6e5a8af6c2072e8cd39dbc512c683ca7fb2"
            },
            {
              "version": "0a19e61e6d4c6192077ead760ba0a2d350987d4c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4ee94790490ae8dcc97df8597f07836c8a81bbcf"
            },
            {
              "version": "0a19e61e6d4c6192077ead760ba0a2d350987d4c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5405c90d6a47b3014e74ee0618a162449abbbc93"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.12",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.12"
            },
            {
              "version": "6.6.153",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.105",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.46",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}