{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"
            },
            {
              "fixed": "465544b3d6602cfbdc2305d5cbfb7f4954353b63"
            },
            {
              "fixed": "4993e1ab85d7d3f4a40d81852170f9665483bbd8"
            },
            {
              "fixed": "313ead1abed945544703b100a12c5a10fdf78409"
            },
            {
              "fixed": "c1d9c16af51cc6ff92a5a062617d3b022dd01078"
            },
            {
              "fixed": "a38212687519f2a72f43e62dec1348a690412404"
            },
            {
              "fixed": "9a1d7c5f0d82e8665715d5e47c9410c6a97e3748"
            },
            {
              "fixed": "5215ea00a747eca34cb2f603cfef91fef76c2558"
            },
            {
              "fixed": "cbcc0e8dea499e5ca86b583372ccb1815cccc570"
            },
            {
              "fixed": "a13cdb19fcb223ed41bdab3bab42b98dba87e90b"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.12"
            },
            {
              "fixed": "5.10.267"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.218"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.185"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.154"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.106"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.47"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.11"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "7.2.0"
            },
            {
              "fixed": "7.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80781.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: core: fix OOB read of field-\u003eusage in hid_set_field()\n\nhid_set_field() hands field-\u003eusage + offset to hid_dump_input() before\nthe guard that bounds offset:\n\n\thid_dump_input(field-\u003ereport-\u003edevice, field-\u003eusage + offset, value);\n\n\tif (offset \u003e= field-\u003ereport_count) {\n\t\thid_err(...);\n\t\treturn -1;\n\t}\n\nUnder CONFIG_DEBUG_FS hid_dump_input() dereferences that pointer, with\nbuf = hid_resolv_usage(usage-\u003ehid, NULL).  The usage[] array is\nallocated inline with the hid_field in hid_register_field() and holds\nfield-\u003emaxusage entries, so an offset past it reads off the end of the\nkvzalloc()ed allocation and into a neighbouring object.  Had the guard\nrun first, offset \u003c report_count \u003c= maxusage would already have confined\nthe pointer to the array.\n\nA caller supplies such an offset today.  picolcd_fb_send_tile()\nvalidates only report-\u003emaxfield before issuing\nhid_set_field(report-\u003efield[0], 11 + i, ...) for i = 0..31, so its\noffsets are fixed at 11..42 and are never checked against the bound\nfield.  When the device registers that field with fewer usages, the\nframebuffer deferred-io work drives the read on every tile.  KASAN\nreports a 4-byte slab-out-of-bounds read in hid_dump_input() below\nhid_set_field(), and the same boot logs \"offset (1) exceeds\nreport_count (1)\" from the guard that runs only afterwards.\n\nMove the hid_dump_input() call below the guard.  Because\nfield-\u003emaxusage \u003e= field-\u003ereport_count, the guard then establishes that\nfield-\u003eusage + offset lies inside the array before it is dereferenced,\nfor every caller and without changing behaviour on the valid path.\n\nDiscovered by XBOW, triaged by Baul Lee \u003cbaul.lee@xbow.com\u003e",
  "id": "CVE-2026-80781",
  "modified": "2026-09-06T03:30:30.029761497Z",
  "published": "2026-09-04T15:12:52.980Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/313ead1abed945544703b100a12c5a10fdf78409"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/465544b3d6602cfbdc2305d5cbfb7f4954353b63"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4993e1ab85d7d3f4a40d81852170f9665483bbd8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5215ea00a747eca34cb2f603cfef91fef76c2558"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9a1d7c5f0d82e8665715d5e47c9410c6a97e3748"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a13cdb19fcb223ed41bdab3bab42b98dba87e90b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a38212687519f2a72f43e62dec1348a690412404"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c1d9c16af51cc6ff92a5a062617d3b022dd01078"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cbcc0e8dea499e5ca86b583372ccb1815cccc570"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80781.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80781"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "HID: core: fix OOB read of field-\u003eusage in hid_set_field()"
}