CVE-2026-74642 PUBLISHED

ALSA: usb: Fix UAF at delayed release of MIDI2 EPs

Assigner: Linux
Reserved: 15.08.2026 Published: 22.08.2026 Updated: 22.08.2026

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

ALSA: usb: Fix UAF at delayed release of MIDI2 EPs

The recent fix for UAF in ump_to_endpoint() caused another UAF because it tries to dereference the UMP endpoint object, but this might be executed at a delayed context where the endpoint has been already released.

Add private_free to clear the associated data for avoiding the further dereference for delayed releases.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 49eccef6d6e1c00dac6fb2e7eb6f9206c33e1c37 to d431941825d357be7d9ab0cb7505e3a1963bd89e (excl.)
  • affected from 8a7a33b846d6ba695891b8d0040027cdbad8cd52 to 422d8a02de5ce6a29d616d55e5ead5dec69ac1d7 (excl.)
  • affected from cc014ebf803174f0e5d15956dfc5a38413c945ae to d217d723c5e43881b952cdb978477f7f2dc0b6d7 (excl.)
  • affected from ae388c0e1bf727972096f770f82d12e4f748d1b6 to f9d492a39ebeb1a56f13ec6dd165a18a48dec812 (excl.)
  • affected from 4a05b2d1b4642df74f30b6f54843e825c4a2bfd3 to f8a80cfb68613fb7e6452b66447dbc63f435d140 (excl.)
Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 6.6.151 to 6.6.152 (excl.)
  • affected from 6.12.103 to 6.12.104 (excl.)
  • affected from 6.18.44 to 6.18.45 (excl.)
  • affected from 7.1.8 to 7.1.9 (excl.)

References