{
  "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-2026-46209",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-46209",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-28T09:40:27.092Z",
    "updatedAt": "2026-10-19T19:36:55.238Z",
    "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": "drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()\n\ndrm_gem_fb_init_with_funcs() computes sub-sampled plane dimensions\nusing plain integer division:\n\n  unsigned int width  = mode_cmd->width  / (i ? info->hsub : 1);\n  unsigned int height = mode_cmd->height / (i ? info->vsub : 1);\n\nHowever, the ioctl-level framebuffer_check() in drm_framebuffer.c uses\ndrm_format_info_plane_width/height() which round up dimensions via\nDIV_ROUND_UP(). This inconsistency corrupts the subsequent GEM object\nsize check for certain pixel format and dimension combinations.\n\nFor example, with NV12 (vsub=2) and a 1-pixel-tall framebuffer the\nGEM size validation path sees height=0 instead of height=1. The\nexpression (height - 1) then wraps to UINT_MAX as an unsigned int,\ncausing min_size to overflow and wrap back to a small value. A tiny\nGEM object therefore passes the size guard, yet when the GPU accesses\nthe chroma plane it will read or write memory beyond the object's\nbounds.\n\nFix by replacing the open-coded divisions with drm_format_info_plane_width()\nand drm_format_info_plane_height(), which use DIV_ROUND_UP() and match\nthe calculation already used in framebuffer_check().",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "4c3dbb2c312c9fafbac30d98c523b8b1f3455d78",
              "status": "affected",
              "versionType": "git",
              "lessThan": "11427ad6c9f0def5ce567982b785da3191946430"
            },
            {
              "version": "4c3dbb2c312c9fafbac30d98c523b8b1f3455d78",
              "status": "affected",
              "versionType": "git",
              "lessThan": "adfc5ba4ef4dd2bca5969f40e8fc7b41fb3902ad"
            },
            {
              "version": "4c3dbb2c312c9fafbac30d98c523b8b1f3455d78",
              "status": "affected",
              "versionType": "git",
              "lessThan": "22922f7dae74409fc4bf0f1142710cb6b8ce8cc2"
            },
            {
              "version": "4c3dbb2c312c9fafbac30d98c523b8b1f3455d78",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6b992591e04f2cce813bcf239b354f375bbf84d3"
            },
            {
              "version": "4c3dbb2c312c9fafbac30d98c523b8b1f3455d78",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1da4ab7189f1064b3b712b388772c008b4d82580"
            },
            {
              "version": "4c3dbb2c312c9fafbac30d98c523b8b1f3455d78",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1a17ea9861e89585361caa8bc231bd22dc6dbe7d"
            },
            {
              "version": "4c3dbb2c312c9fafbac30d98c523b8b1f3455d78",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c5fc49d8470c5ebf3b41607600f277158f159950"
            },
            {
              "version": "4c3dbb2c312c9fafbac30d98c523b8b1f3455d78",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3d4c2268bd7243c3780fe32bf24ff876da272acf"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.14",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.14"
            },
            {
              "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": "6.6.140",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.90",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.32",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.9",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}