CVE-2026-80918 (GCVE-0-2026-80918)
Vulnerability from cvelistv5
Published
2026-09-09 16:13
Modified
2026-10-19 08:45
Severity ?
VLAI Severity ?
EPSS score ?
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 3dc8fc083dbfeede7b63a0c07581192e97711365 Version: 3dc8fc083dbfeede7b63a0c07581192e97711365 Version: 3dc8fc083dbfeede7b63a0c07581192e97711365 Version: 3dc8fc083dbfeede7b63a0c07581192e97711365 Version: 3dc8fc083dbfeede7b63a0c07581192e97711365 Version: 3dc8fc083dbfeede7b63a0c07581192e97711365 Version: 3dc8fc083dbfeede7b63a0c07581192e97711365 Version: 3dc8fc083dbfeede7b63a0c07581192e97711365 Version: 3dc8fc083dbfeede7b63a0c07581192e97711365 |
||
{
"containers": {
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"programFiles": [
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"version": "3.12"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"version": "5.10.267",
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},
{
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},
{
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},
{
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},
{
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"version": "7.2.1",
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},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
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],
"negate": false,
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],
"descriptions": [
{
"lang": "en",
"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."
}
],
"providerMetadata": {
"dateUpdated": "2026-10-19T08:45:02.656Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/bed7fe3a936b6bdd84671385951397ca673cf6e7"
},
{
"url": "https://git.kernel.org/stable/c/aec2c2ec87d4ec1f098979f68cd81b29f031c8cb"
},
{
"url": "https://git.kernel.org/stable/c/634f498ea5d5e8e01f8d9414d4f45eeaf9ee1996"
},
{
"url": "https://git.kernel.org/stable/c/abec577de5fc16cd5caae42f97cdcd0983c06d66"
},
{
"url": "https://git.kernel.org/stable/c/dd8035dec26e98204d6e4a6e0cee5c4d329b3d7e"
},
{
"url": "https://git.kernel.org/stable/c/1fa1591efd417e39e5e164bebea8ca7a3837c469"
},
{
"url": "https://git.kernel.org/stable/c/e60159f5ea60254a5c3de4ea4f2f939f0171031b"
},
{
"url": "https://git.kernel.org/stable/c/e542edada3f79387c0ac2a528cebf01f4ef47df8"
},
{
"url": "https://git.kernel.org/stable/c/28abce951343fcec26e397610868efa4e1395c3f"
}
],
"title": "HID: core: fix number/pointer type confusion on long items",
"x_generator": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-80918",
"datePublished": "2026-09-09T16:13:15.799Z",
"dateReserved": "2026-08-26T14:34:25.801Z",
"dateUpdated": "2026-10-19T08:45:02.656Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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