CVE-2026-80918 is a vulnerability in Linux Kernel
Published on September 9, 2026
HID: core: fix number/pointer type confusion on long items
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.
Products Associated with CVE-2026-80918
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Affected Versions
Linux:- Version 3dc8fc083dbfeede7b63a0c07581192e97711365 and below bed7fe3a936b6bdd84671385951397ca673cf6e7 is affected.
- Version 3dc8fc083dbfeede7b63a0c07581192e97711365 and below aec2c2ec87d4ec1f098979f68cd81b29f031c8cb is affected.
- Version 3dc8fc083dbfeede7b63a0c07581192e97711365 and below 634f498ea5d5e8e01f8d9414d4f45eeaf9ee1996 is affected.
- Version 3dc8fc083dbfeede7b63a0c07581192e97711365 and below abec577de5fc16cd5caae42f97cdcd0983c06d66 is affected.
- Version 3dc8fc083dbfeede7b63a0c07581192e97711365 and below dd8035dec26e98204d6e4a6e0cee5c4d329b3d7e is affected.
- Version 3dc8fc083dbfeede7b63a0c07581192e97711365 and below 1fa1591efd417e39e5e164bebea8ca7a3837c469 is affected.
- Version 3dc8fc083dbfeede7b63a0c07581192e97711365 and below e60159f5ea60254a5c3de4ea4f2f939f0171031b is affected.
- Version 3dc8fc083dbfeede7b63a0c07581192e97711365 and below e542edada3f79387c0ac2a528cebf01f4ef47df8 is affected.
- Version 3dc8fc083dbfeede7b63a0c07581192e97711365 and below 28abce951343fcec26e397610868efa4e1395c3f is affected.
- Version 3.12 is affected.
- Before 3.12 is unaffected.
- Version 5.10.267, <= 5.10.* is unaffected.
- Version 5.15.218, <= 5.15.* is unaffected.
- Version 6.1.185, <= 6.1.* is unaffected.
- Version 6.6.154, <= 6.6.* is unaffected.
- Version 6.12.106, <= 6.12.* is unaffected.
- Version 6.18.47, <= 6.18.* is unaffected.
- Version 7.1.11, <= 7.1.* is unaffected.
- Version 7.2.1, <= 7.2.* is unaffected.
- Version 7.3-rc1, <= * is unaffected.