{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "c8a17756c42581ba1a567d1dd3b69e8f5619a7d8"
            },
            {
              "fixed": "ded6ad826fe0fd059333d3a3b3e1742c8e45ff41"
            },
            {
              "fixed": "d9daf9a6e7a6f82ef338a09386eefc6807100d3f"
            },
            {
              "fixed": "c6f48e59ece0123f6a11527ad4d89b21c2d65b87"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.18.51"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89806.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/sysfb: ofdrm: Fix integer overflow in fb_size calculation\n\nThe framebuffer size calculation `fb_size = linebytes * height` can\noverflow when both values are large (e.g., 46341 * 46341 \u003e INT_MAX).\nSince linebytes and height are both int types, the multiplication is\nperformed as int * int, which results in undefined behavior on overflow.\n\nUse check_mul_overflow() to detect and prevent this overflow, consistent\nwith the approach used in simpledrm.c and corebootdrm.c.",
  "id": "CVE-2026-89806",
  "modified": "2026-09-18T03:30:15.542601303Z",
  "published": "2026-09-16T10:30:39.548Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6f48e59ece0123f6a11527ad4d89b21c2d65b87"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d9daf9a6e7a6f82ef338a09386eefc6807100d3f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ded6ad826fe0fd059333d3a3b3e1742c8e45ff41"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89806.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89806"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "drm/sysfb: ofdrm: Fix integer overflow in fb_size calculation"
}