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CVE-2026-80918

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.267, 5.15.218, 6.1.185, 6.6.154, 6.12.106, and 3 more
None on Exploit-DB, Metasploit or GitHub

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.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 3dc8fc083dbfeede7b63a0c07581192e97711365 · fixed in bed7fe3a936b6bdd84671385951397ca673cf6e7; From 3dc8fc083dbfeede7b63a0c07581192e97711365 · fixed in aec2c2ec87d4ec1f098979f68cd81b29f031c8cb; From 3dc8fc083dbfeede7b63a0c07581192e97711365 · fixed in 634f498ea5d5e8e01f8d9414d4f45eeaf9ee1996; From 3dc8fc083dbfeede7b63a0c07581192e97711365 · fixed in abec577de5fc16cd5caae42f97cdcd0983c06d66; From 3dc8fc083dbfeede7b63a0c07581192e97711365 · fixed in dd8035dec26e98204d6e4a6e0cee5c4d329b3d7e; From 3dc8fc083dbfeede7b63a0c07581192e97711365 · fixed in 1fa1591efd417e39e5e164bebea8ca7a3837c469; From 3dc8fc083dbfeede7b63a0c07581192e97711365 · fixed in e60159f5ea60254a5c3de4ea4f2f939f0171031b; From 3dc8fc083dbfeede7b63a0c07581192e97711365 · fixed in e542edada3f79387c0ac2a528cebf01f4ef47df8; From 3dc8fc083dbfeede7b63a0c07581192e97711365 · fixed in 28abce951343fcec26e397610868efa4e1395c3f

  • Linux Linux

    3.12

  • KernelLinux

    From 3.12.0 · fixed in 5.10.267; From 5.11.0 · fixed in 5.15.218; From 5.16.0 · fixed in 6.1.185; From 6.2.0 · fixed in 6.6.154; From 6.7.0 · fixed in 6.12.106; From 6.13.0 · fixed in 6.18.47; From 6.19.0 · fixed in 7.1.11; From 7.2.0 · fixed in 7.2.1

References 9

git.kernel.org