CVE-2026-98501 PUBLISHED

HID: alps: fix use-after-free on input2 registration failure

Assigner: Linux
Reserved: 25.09.2026 Published: 18.10.2026 Updated: 18.10.2026

In the Linux kernel, the following vulnerability has been resolved:

HID: alps: fix use-after-free on input2 registration failure

alps_input_configured() stores data->input2 before calling input_register_device(). If registration fails, input_free_device() frees the input device but data->input2 still points to the freed memory. alps_input_configured() calls hid_hw_open() before allocating input2, so URBs are already active and raw_event can fire during the failure window. A U1_SP_ABSOLUTE_REPORT_ID report arriving then causes u1_raw_event() to dereference the freed data->input2 -> use-after-free.

Fix by only storing input2 into drvdata after successful registration and adding a NULL guard in the raw_event path.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 2562756dde550901c224e3805102bdfc17e7d13a to 64f824dccfd316fd3db8ea1cc4e8a76ad6a02740 (excl.)
  • affected from 2562756dde550901c224e3805102bdfc17e7d13a to 2e55d76e6e8a756f6d87c241de975599f82b02fa (excl.)
  • affected from 2562756dde550901c224e3805102bdfc17e7d13a to ef8ca5bb4c8b9696f38b1bebce1c851baa02b77b (excl.)
  • affected from 2562756dde550901c224e3805102bdfc17e7d13a to 5a8ad63158165bacd6a1d7420e0fe5364c913b06 (excl.)
  • affected from 2562756dde550901c224e3805102bdfc17e7d13a to 47e5e177e9e4e10da6f2759d5ce8d049e33efdc4 (excl.)
  • affected from 2562756dde550901c224e3805102bdfc17e7d13a to 925da1d2a24787f24872de13a4680437c54de179 (excl.)
  • affected from 2562756dde550901c224e3805102bdfc17e7d13a to 443f6b93442b10b972a16f57ceaaea75b77892b6 (excl.)
  • affected from 2562756dde550901c224e3805102bdfc17e7d13a to d3aba3442798ce4a4c8ce3104d7b286d61e605f9 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 4.8 is affected
  • unaffected from 0 to 4.8 (excl.)
  • unaffected from 5.10.271 to 5.10.* (incl.)
  • unaffected from 5.15.222 to 5.15.* (incl.)
  • unaffected from 6.1.189 to 6.1.* (incl.)
  • unaffected from 6.6.158 to 6.6.* (incl.)
  • unaffected from 6.12.112 to 6.12.* (incl.)
  • unaffected from 6.18.55 to 6.18.* (incl.)
  • unaffected from 7.2.9 to 7.2.* (incl.)
  • unaffected from 7.3-rc5 to * (incl.)

References