{
  "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-2026-64427",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-64427",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-25T08:51:04.686Z",
    "updatedAt": "2026-08-19T16:28:13.596Z",
    "importedAt": "2026-10-24T01:58:25.636Z",
    "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": "HID: logitech-dj: Fix maxfield check in DJ short report validation",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: logitech-dj: Fix maxfield check in DJ short report validation\n\nCommit b6a57912854e (\"HID: logitech-dj: Prevent REPORT_ID_DJ_SHORT\nrelated user initiated OOB write\") added validation for the DJ short\noutput report, but the error path dereferences rep->field[0] even when\nrep->maxfield is zero.\n\nCommit 8b9a097eb2fc (\"HID: logitech-dj: fix wrong detection of bad\nDJ_SHORT output report\") made the check conditional on rep being present,\nbut a crafted descriptor can still create report ID 0x20 with only padding\noutput items. hid-core registers the report, ignores the padding field,\nand leaves rep->maxfield as zero.\n\nIn that case the validation enters the rep->maxfield < 1 branch and then\ndereferences rep->field[0]->report_count while printing the error message,\ncausing a NULL pointer dereference during probe. This is reproducible with\nuhid by emulating a Logitech receiver with a padding-only DJ short output\nreport:\n\n  BUG: KASAN: null-ptr-deref in logi_dj_probe+0xb1/0x754 [hid_logitech_dj]\n  Read of size 4 at addr 0000000000000028 by task kworker/4:1/129\n  ...\n  Call Trace:\n   logi_dj_probe+0xb1/0x754 [hid_logitech_dj]\n   hid_device_probe+0x329/0x3f0 [hid]\n   really_probe+0x162/0x570\n   __device_attach+0x137/0x2c0\n   bus_probe_device+0x38/0xc0\n   device_add+0xa56/0xce0\n   hid_add_device+0x19c/0x280 [hid]\n   uhid_device_add_worker+0x2c/0xb0 [uhid]\n\nReject the zero-field report before printing the field report_count.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "7754ade02d0fb1caf20392baf4e02937378fd136",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f3790a6af9c7f47d454225cab9dc145270e48f62"
            },
            {
              "version": "2ed9638cfbf9d49bdef9b0f5ee547236c2c2f500",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1215febd644c3e16f77e0f1799d89544dd57a754"
            },
            {
              "version": "eeb5ad388595ca2b6624689198a057847f3a3e19",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6f7f22a8d244c2e586b8eb61c7585784b62aea01"
            },
            {
              "version": "968e84f5c0dca4960580d174500e4bbf0c45dc15",
              "status": "affected",
              "versionType": "git",
              "lessThan": "95b3f23d632490b5eb285b9fcf7284f2ac8f9872"
            },
            {
              "version": "ce2a731c179df8869e1969a1b2b5b9e4e1c25f8b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "80c1e18473f63fd7c6a2bc9ad6f3d0a6cc4fb500"
            },
            {
              "version": "bc3bba4656ad280267ea78cf845ab6b1d95b9fcd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2b70bebc709489d29a31ac2935aeffb8d5228395"
            },
            {
              "version": "b6a57912854e7ea36f3b270032661140cc4209cd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7a89ad762fad53d56b7002d7ffc923a4b7f4006f"
            },
            {
              "version": "b6a57912854e7ea36f3b270032661140cc4209cd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "590cc4d782487632a52f37c2171bee1eeea29627"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "7.1",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "7.1"
            },
            {
              "version": "7.1.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}