{
  "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-2025-39967",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-39967",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-10-15T07:55:51.554Z",
    "updatedAt": "2026-08-05T12:06:36.336Z",
    "importedAt": "2026-10-24T01:57:34.152Z",
    "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": "fbcon: fix integer overflow in fbcon_do_set_font",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbcon: fix integer overflow in fbcon_do_set_font\n\nFix integer overflow vulnerabilities in fbcon_do_set_font() where font\nsize calculations could overflow when handling user-controlled font\nparameters.\n\nThe vulnerabilities occur when:\n1. CALC_FONTSZ(h, pitch, charcount) performs h * pith * charcount\n   multiplication with user-controlled values that can overflow.\n2. FONT_EXTRA_WORDS * sizeof(int) + size addition can also overflow\n3. This results in smaller allocations than expected, leading to buffer\n   overflows during font data copying.\n\nAdd explicit overflow checking using check_mul_overflow() and\ncheck_add_overflow() kernel helpers to safety validate all size\ncalculations before allocation.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "96e41fc29e8af5c5085fb8a79cab8d0d00bab86c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "994bdc2d23c79087fbf7dcd9544454e8ebcef877"
            },
            {
              "version": "39b3cffb8cf3111738ea993e2757ab382253d86a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9c8ec14075c5317edd6b242f1be8167aa1e4e333"
            },
            {
              "version": "39b3cffb8cf3111738ea993e2757ab382253d86a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b8a6e85328aeb9881531dbe89bcd2637a06c3c95"
            },
            {
              "version": "39b3cffb8cf3111738ea993e2757ab382253d86a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a6eb9f423b3db000aaedf83367b8539f6b72dcfc"
            },
            {
              "version": "39b3cffb8cf3111738ea993e2757ab382253d86a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "adac90bb1aaf45ca66f9db8ac100be16750ace78"
            },
            {
              "version": "39b3cffb8cf3111738ea993e2757ab382253d86a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4a4bac869560f943edbe3c2b032062f6673b13d3"
            },
            {
              "version": "39b3cffb8cf3111738ea993e2757ab382253d86a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c0c01f9aa08c8e10e10e8c9ebb5be01a4eff6eb7"
            },
            {
              "version": "39b3cffb8cf3111738ea993e2757ab382253d86a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1a194e6c8e1ee745e914b0b7f50fa86c89ed13fe"
            },
            {
              "version": "ae021a904ac82d9fc81c25329d3c465c5a7d5686",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "451bffa366f2cc0e5314807cb847f31c0226efed",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "2c455e9c5865861f5ce09c5f596909495ed7657c",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "72f099805dbc907fbe8fa19bccdc31d3e2ee6e9e",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "34cf1aff169dc6dedad8d79da7bf1b4de2773dbc",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.4.62",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.4.300"
            },
            {
              "version": "4.4.235",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.5"
            },
            {
              "version": "4.9.235",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.10"
            },
            {
              "version": "4.14.196",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.15"
            },
            {
              "version": "4.19.143",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.20"
            },
            {
              "version": "5.8.6",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.9"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.9",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.9"
            },
            {
              "version": "5.4.300",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.245",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.194",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.155",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.109",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.50",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.16.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.16.*"
            },
            {
              "version": "6.17",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}