{
  "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-2026-53306",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-53306",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-06-26T19:41:01.338Z",
    "updatedAt": "2026-06-26T19:41:01.338Z",
    "importedAt": "2026-10-24T01:58:20.586Z",
    "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": "tty: hvc_iucv: fix off-by-one in number of supported devices",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: hvc_iucv: fix off-by-one in number of supported devices\n\nMAX_HVC_IUCV_LINES == HVC_ALLOC_TTY_ADAPTERS == 8.\nThis is the number of entries in:\n  static struct hvc_iucv_private *hvc_iucv_table[MAX_HVC_IUCV_LINES];\n\nSometimes hvc_iucv_table[] is limited by:\n(a)\tif (num > hvc_iucv_devices) // for error detection\nor\n(b)\tfor (i = 0; i < hvc_iucv_devices; i++) // in 2 places\n(so these 2 don't agree; second one appears to be correct to me.)\n\nhvc_iucv_devices can be 0..8. This is a counter.\n(c)\tif (hvc_iucv_devices > MAX_HVC_IUCV_LINES)\n\nIf hvc_iucv_devices == 8, (a) allows the code to access hvc_iucv_table[8].\nOops.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "44a01d5ba8a4d543694461cd3e178cfa6b3f221b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3d3b89e6ab93bdd0efd45828bda6b0e61cc46dff"
            },
            {
              "version": "44a01d5ba8a4d543694461cd3e178cfa6b3f221b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "484357dff256c816d9466bda35eb765685e4dc86"
            },
            {
              "version": "44a01d5ba8a4d543694461cd3e178cfa6b3f221b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "11207e42a332eb8bbcb9fe74df9edd2a807c5607"
            },
            {
              "version": "44a01d5ba8a4d543694461cd3e178cfa6b3f221b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fed8b8f33a46db0ee2efdb000f4f630c86ed8ca4"
            },
            {
              "version": "44a01d5ba8a4d543694461cd3e178cfa6b3f221b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a76511bc654819425d3b15e77b523d7f9d81f064"
            },
            {
              "version": "44a01d5ba8a4d543694461cd3e178cfa6b3f221b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3104a3f40feb107f77d7116ad9bf6c210ab7babf"
            },
            {
              "version": "44a01d5ba8a4d543694461cd3e178cfa6b3f221b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f1dc8e72de9aabe5d96767a4e97219ac26b79fe5"
            },
            {
              "version": "44a01d5ba8a4d543694461cd3e178cfa6b3f221b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f2a880e802ad12d1e38039d1334fb1475d0f5241"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.29",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.29"
            },
            {
              "version": "5.10.258",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.209",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.175",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.141",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.91",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.33",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}