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CVE-2026-80781 (GCVE-0-2026-80781)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:12 – Updated: 2026-09-04 15:12
VLAI
Title
HID: core: fix OOB read of field->usage in hid_set_field()
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: core: fix OOB read of field->usage in hid_set_field() hid_set_field() hands field->usage + offset to hid_dump_input() before the guard that bounds offset: hid_dump_input(field->report->device, field->usage + offset, value); if (offset >= field->report_count) { hid_err(...); return -1; } Under CONFIG_DEBUG_FS hid_dump_input() dereferences that pointer, with buf = hid_resolv_usage(usage->hid, NULL). The usage[] array is allocated inline with the hid_field in hid_register_field() and holds field->maxusage entries, so an offset past it reads off the end of the kvzalloc()ed allocation and into a neighbouring object. Had the guard run first, offset < report_count <= maxusage would already have confined the pointer to the array. A caller supplies such an offset today. picolcd_fb_send_tile() validates only report->maxfield before issuing hid_set_field(report->field[0], 11 + i, ...) for i = 0..31, so its offsets are fixed at 11..42 and are never checked against the bound field. When the device registers that field with fewer usages, the framebuffer deferred-io work drives the read on every tile. KASAN reports a 4-byte slab-out-of-bounds read in hid_dump_input() below hid_set_field(), and the same boot logs "offset (1) exceeds report_count (1)" from the guard that runs only afterwards. Move the hid_dump_input() call below the guard. Because field->maxusage >= field->report_count, the guard then establishes that field->usage + offset lies inside the array before it is dereferenced, for every caller and without changing behaviour on the valid path. Discovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 465544b3d6602cfbdc2305d5cbfb7f4954353b63 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4993e1ab85d7d3f4a40d81852170f9665483bbd8 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 313ead1abed945544703b100a12c5a10fdf78409 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c1d9c16af51cc6ff92a5a062617d3b022dd01078 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a38212687519f2a72f43e62dec1348a690412404 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9a1d7c5f0d82e8665715d5e47c9410c6a97e3748 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5215ea00a747eca34cb2f603cfef91fef76c2558 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cbcc0e8dea499e5ca86b583372ccb1815cccc570 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a13cdb19fcb223ed41bdab3bab42b98dba87e90b (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.267 , ≤ 5.10.* (semver)
Unaffected: 5.15.218 , ≤ 5.15.* (semver)
Unaffected: 6.1.185 , ≤ 6.1.* (semver)
Unaffected: 6.6.154 , ≤ 6.6.* (semver)
Unaffected: 6.12.106 , ≤ 6.12.* (semver)
Unaffected: 6.18.47 , ≤ 6.18.* (semver)
Unaffected: 7.1.11 , ≤ 7.1.* (semver)
Unaffected: 7.2.1 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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          "value": "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"
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        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/465544b3d6602cfbdc2305d5cbfb7f4954353b63"
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          "url": "https://git.kernel.org/stable/c/4993e1ab85d7d3f4a40d81852170f9665483bbd8"
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        },
        {
          "url": "https://git.kernel.org/stable/c/a13cdb19fcb223ed41bdab3bab42b98dba87e90b"
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      ],
      "title": "HID: core: fix OOB read of field-\u003eusage in hid_set_field()",
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    "datePublished": "2026-09-04T15:12:52.980Z",
    "dateReserved": "2026-08-26T14:34:25.792Z",
    "dateUpdated": "2026-09-04T15:12:52.980Z",
    "state": "PUBLISHED"
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      "date": "2026-09-14",
      "epss": "0.00195",
      "percentile": "0.09375"
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      "cve": "CVE-2026-80781",
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      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
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      "title": "HID: core: fix OOB read of field-\u003eusage in hid_set_field()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-80781.json",
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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\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/hid/hid-core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"465544b3d6602cfbdc2305d5cbfb7f4954353b63\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"4993e1ab85d7d3f4a40d81852170f9665483bbd8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"313ead1abed945544703b100a12c5a10fdf78409\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"c1d9c16af51cc6ff92a5a062617d3b022dd01078\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"a38212687519f2a72f43e62dec1348a690412404\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"9a1d7c5f0d82e8665715d5e47c9410c6a97e3748\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"5215ea00a747eca34cb2f603cfef91fef76c2558\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"cbcc0e8dea499e5ca86b583372ccb1815cccc570\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"a13cdb19fcb223ed41bdab3bab42b98dba87e90b\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/hid/hid-core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.267\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.218\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.185\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.154\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.106\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.47\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.11\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.1\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/313ead1abed945544703b100a12c5a10fdf78409\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/465544b3d6602cfbdc2305d5cbfb7f4954353b63\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4993e1ab85d7d3f4a40d81852170f9665483bbd8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5215ea00a747eca34cb2f603cfef91fef76c2558\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9a1d7c5f0d82e8665715d5e47c9410c6a97e3748\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a13cdb19fcb223ed41bdab3bab42b98dba87e90b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a38212687519f2a72f43e62dec1348a690412404\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c1d9c16af51cc6ff92a5a062617d3b022dd01078\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cbcc0e8dea499e5ca86b583372ccb1815cccc570\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-09-08T17:17:49Z",
      "cve": "CVE-2026-80781",
      "id": "CVE-2026-80781",
      "initial_release_date": "2026-09-05T00:27:37Z",
      "product_status:known_affected": "269",
      "product_status:known_not_affected": "84",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80781",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80781.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.