HID: core: fix number/pointer type confusion on long items

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80918
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-09 17:17:46 UTC
Updated2026-09-09 17:17:46 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 3dc8fc083dbfeede7b63a0c07581192e97711365 bed7fe3a936b6bdd84671385951397ca673cf6e7 git Not specified
CNA Linux Linux affected 3dc8fc083dbfeede7b63a0c07581192e97711365 aec2c2ec87d4ec1f098979f68cd81b29f031c8cb git Not specified
CNA Linux Linux affected 3dc8fc083dbfeede7b63a0c07581192e97711365 634f498ea5d5e8e01f8d9414d4f45eeaf9ee1996 git Not specified
CNA Linux Linux affected 3dc8fc083dbfeede7b63a0c07581192e97711365 abec577de5fc16cd5caae42f97cdcd0983c06d66 git Not specified
CNA Linux Linux affected 3dc8fc083dbfeede7b63a0c07581192e97711365 dd8035dec26e98204d6e4a6e0cee5c4d329b3d7e git Not specified
CNA Linux Linux affected 3dc8fc083dbfeede7b63a0c07581192e97711365 1fa1591efd417e39e5e164bebea8ca7a3837c469 git Not specified
CNA Linux Linux affected 3dc8fc083dbfeede7b63a0c07581192e97711365 e60159f5ea60254a5c3de4ea4f2f939f0171031b git Not specified
CNA Linux Linux affected 3dc8fc083dbfeede7b63a0c07581192e97711365 e542edada3f79387c0ac2a528cebf01f4ef47df8 git Not specified
CNA Linux Linux affected 3dc8fc083dbfeede7b63a0c07581192e97711365 28abce951343fcec26e397610868efa4e1395c3f git Not specified
CNA Linux Linux affected 3.12 Not specified
CNA Linux Linux unaffected 3.12 semver Not specified
CNA Linux Linux unaffected 5.10.267 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.218 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.185 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.154 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.106 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.47 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.11 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2.1 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/abec577de5fc16cd5caae42f97cdcd0983c06d66 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/634f498ea5d5e8e01f8d9414d4f45eeaf9ee1996 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/28abce951343fcec26e397610868efa4e1395c3f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bed7fe3a936b6bdd84671385951397ca673cf6e7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1fa1591efd417e39e5e164bebea8ca7a3837c469 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e542edada3f79387c0ac2a528cebf01f4ef47df8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e60159f5ea60254a5c3de4ea4f2f939f0171031b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/dd8035dec26e98204d6e4a6e0cee5c4d329b3d7e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/aec2c2ec87d4ec1f098979f68cd81b29f031c8cb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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