{
  "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-2026-43497",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-43497",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-21T12:12:47.150Z",
    "updatedAt": "2026-08-05T12:28:19.915Z",
    "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": "fbdev: udlfb: add vm_ops to dlfb_ops_mmap to prevent use-after-free",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: udlfb: add vm_ops to dlfb_ops_mmap to prevent use-after-free\n\ndlfb_ops_mmap() uses remap_pfn_range() to map vmalloc framebuffer pages\nto userspace but sets no vm_ops on the VMA. This means the kernel cannot\ntrack active mmaps. When dlfb_realloc_framebuffer() replaces the backing\nbuffer via FBIOPUT_VSCREENINFO, existing mmap PTEs are not invalidated.\nOn USB disconnect, dlfb_ops_destroy() calls vfree() on the old pages\nwhile userspace PTEs still reference them, resulting in a use-after-free:\nthe process retains read/write access to freed kernel pages.\n\nAdd vm_operations_struct with open/close callbacks that maintain an\natomic mmap_count on struct dlfb_data. In dlfb_realloc_framebuffer(),\ncheck mmap_count and return -EBUSY if the buffer is currently mapped,\npreventing buffer replacement while userspace holds stale PTEs.\n\nTested with PoC using dummy_hcd + raw_gadget USB device emulation.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "7433914efd584b22bb49d3e1eee001f5d0525ecd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "60f711cfd580f86fea8284146ac133804e728f9a"
            },
            {
              "version": "7433914efd584b22bb49d3e1eee001f5d0525ecd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5931f5651ee32bd41b3323256b31fcc8e71336ed"
            },
            {
              "version": "7433914efd584b22bb49d3e1eee001f5d0525ecd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e3d9865dacd7435b8465848428210d0f0c673311"
            },
            {
              "version": "7433914efd584b22bb49d3e1eee001f5d0525ecd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4f312c30f0368e8d2a76aa650dff73f23490b5e7"
            },
            {
              "version": "7433914efd584b22bb49d3e1eee001f5d0525ecd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "18dd358de72d57993422cbb5dfb29ccd74efe192"
            },
            {
              "version": "7433914efd584b22bb49d3e1eee001f5d0525ecd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "da9b065cedfd3b574f229d5be594e6aa47a27ae6"
            },
            {
              "version": "7433914efd584b22bb49d3e1eee001f5d0525ecd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a2c53a3822ee26e8d758071815b9ed3bf6669fc1"
            },
            {
              "version": "7433914efd584b22bb49d3e1eee001f5d0525ecd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8de779dc40d35d39fa07387b6f921eb11df0f511"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.19",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.19"
            },
            {
              "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": "6.12.88",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.30",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.7",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}