CVE-2026-80918 (GCVE-0-2026-80918)

Vulnerability from cvelistv5 – Published: 2026-09-09 16:13 – Updated: 2026-10-19 08:45
VLAI
Title
HID: core: fix number/pointer type confusion on long items
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: core: fix number/pointer type confusion on long items When fetch_item() is called by hid_scan_report() on an item with HID_ITEM_TAG_LONG, it stores a pointer to the item data in item->data.longdata instead of storing a value directly in item->data.{u8/u16/u32}. When item_udata() or item_sdata() encounters such an item, it incorrectly assumes that the item is in short format, and therefore returns the lower part of a kernel pointer reinterpreted as a number. When a HID device is connected whose descriptor contains a HID_GLOBAL_ITEM_TAG_REPORT_SIZE encoded in long format with size=4, this causes the lower half of a kernel pointer to be printed into dmesg as a number, like this: hid (null): invalid report_size 107953555 To fix it, let item_udata() and item_sdata() verify that the item is in short format. Note that this bug only affects hid_scan_report(), while the main parsing pass hid_parse_collections() will always bail out when encountering a long item. Sidenote: There are currently no users of data.longdata; maybe we should just remove any parsing of long-format descriptors as a follow-up.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6971 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3dc8fc083dbfeede7b63a0c07581192e97711365 , < bed7fe3a936b6bdd84671385951397ca673cf6e7 (git)
Affected: 3dc8fc083dbfeede7b63a0c07581192e97711365 , < aec2c2ec87d4ec1f098979f68cd81b29f031c8cb (git)
Affected: 3dc8fc083dbfeede7b63a0c07581192e97711365 , < 634f498ea5d5e8e01f8d9414d4f45eeaf9ee1996 (git)
Affected: 3dc8fc083dbfeede7b63a0c07581192e97711365 , < abec577de5fc16cd5caae42f97cdcd0983c06d66 (git)
Affected: 3dc8fc083dbfeede7b63a0c07581192e97711365 , < dd8035dec26e98204d6e4a6e0cee5c4d329b3d7e (git)
Affected: 3dc8fc083dbfeede7b63a0c07581192e97711365 , < 1fa1591efd417e39e5e164bebea8ca7a3837c469 (git)
Affected: 3dc8fc083dbfeede7b63a0c07581192e97711365 , < e60159f5ea60254a5c3de4ea4f2f939f0171031b (git)
Affected: 3dc8fc083dbfeede7b63a0c07581192e97711365 , < e542edada3f79387c0ac2a528cebf01f4ef47df8 (git)
Affected: 3dc8fc083dbfeede7b63a0c07581192e97711365 , < 28abce951343fcec26e397610868efa4e1395c3f (git)
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Linux Linux Affected: 3.12
Unaffected: 0 , < 3.12 (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 , ≤ * (original_commit_for_fix)
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{
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        }
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          "url": "https://git.kernel.org/stable/c/28abce951343fcec26e397610868efa4e1395c3f"
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: core: fix number/pointer type confusion on long items\n\nWhen fetch_item() is called by hid_scan_report() on an item with\nHID_ITEM_TAG_LONG, it stores a pointer to the item data in\nitem-\u003edata.longdata instead of storing a value directly in\nitem-\u003edata.{u8/u16/u32}.\n\nWhen item_udata() or item_sdata() encounters such an item, it incorrectly\nassumes that the item is in short format, and therefore returns the lower\npart of a kernel pointer reinterpreted as a number.\n\nWhen a HID device is connected whose descriptor contains a\nHID_GLOBAL_ITEM_TAG_REPORT_SIZE encoded in long format with size=4, this\ncauses the lower half of a kernel pointer to be printed into dmesg as a\nnumber, like this:\n\n    hid (null): invalid report_size 107953555\n\nTo fix it, let item_udata() and item_sdata() verify that the item is in\nshort format.\n\nNote that this bug only affects hid_scan_report(), while the main parsing\npass hid_parse_collections() will always bail out when encountering a long\nitem.\n\nSidenote: There are currently no users of data.longdata; maybe we should\njust remove any parsing of long-format descriptors as a follow-up."
          }
        ],
        "id": "CVE-2026-80918",
        "lastModified": "2026-10-19T09:17:22.707",
        "metrics": {},
        "published": "2026-09-09T17:17:46.847",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-10-30T01:19:49+00:00",
      "cve": "CVE-2026-80918",
      "id": "CVE-2026-80918",
      "initial_release_date": "2026-09-09T00:00:00+00:00",
      "product_status:known_affected": "278",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: HID: core: fix number/pointer type confusion on long items",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80918.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-20T01:20:37Z",
      "cve": "CVE-2026-80918",
      "id": "CVE-2026-80918",
      "initial_release_date": "2026-09-10T01:49:41Z",
      "product_status:known_affected": "265",
      "product_status:known_not_affected": "89",
      "product_status:recommended": "4",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80918",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-80918.json",
      "version": "5"
    }
  }
}



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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.