{
  "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-2026-45890",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-45890",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-27T12:17:01.466Z",
    "updatedAt": "2026-05-27T12:17:01.466Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "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": "xen-netback: reject zero-queue configuration from guest",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen-netback: reject zero-queue configuration from guest\n\nA malicious or buggy Xen guest can write \"0\" to the xenbus key\n\"multi-queue-num-queues\". The connect() function in the backend only\nvalidates the upper bound (requested_num_queues > xenvif_max_queues)\nbut not zero, allowing requested_num_queues=0 to reach\nvzalloc(array_size(0, sizeof(struct xenvif_queue))), which triggers\nWARN_ON_ONCE(!size) in __vmalloc_node_range().\n\nOn systems with panic_on_warn=1, this allows a guest-to-host denial\nof service.\n\nThe Xen network interface specification requires\nthe queue count to be \"greater than zero\".\n\nAdd a zero check to match the validation already present\nin xen-blkback, which has included this\nguard since its multi-queue support was added.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8d3d53b3e43363e79ab9a9ecc149b06c1314b25d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2993e0f904c45f8af12917344bb1cac7ccd05a60"
            },
            {
              "version": "8d3d53b3e43363e79ab9a9ecc149b06c1314b25d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "787bfa423228c4b02ba3368128f625d579085353"
            },
            {
              "version": "8d3d53b3e43363e79ab9a9ecc149b06c1314b25d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ce66d6786de45b7ed9cbbdc0988054bf09e58f54"
            },
            {
              "version": "8d3d53b3e43363e79ab9a9ecc149b06c1314b25d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "88b0fced1bbbfdb356a007592604008ffc93a6a1"
            },
            {
              "version": "8d3d53b3e43363e79ab9a9ecc149b06c1314b25d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ec4859ac5c933e3315543a61adc1ca4358006a41"
            },
            {
              "version": "8d3d53b3e43363e79ab9a9ecc149b06c1314b25d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "654780dee9eae419e1648ea58462c4efe54518fa"
            },
            {
              "version": "8d3d53b3e43363e79ab9a9ecc149b06c1314b25d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d99f69ddc70fd9f4b8148add62209a1a8eb5c615"
            },
            {
              "version": "8d3d53b3e43363e79ab9a9ecc149b06c1314b25d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6d1dc8014334c7fb25719999bca84d811e60a559"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.16",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.16"
            },
            {
              "version": "5.10.252",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.202",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.165",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.128",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.75",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.14",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}