CVE-2026-74642

Description

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.

References

• https://git.kernel.org/stable/c/422d8a02de5ce6a29d616d55e5ead5dec69ac1d7
• https://git.kernel.org/stable/c/d217d723c5e43881b952cdb978477f7f2dc0b6d7
• https://git.kernel.org/stable/c/d431941825d357be7d9ab0cb7505e3a1963bd89e
• https://git.kernel.org/stable/c/f8a80cfb68613fb7e6452b66447dbc63f435d140
• https://git.kernel.org/stable/c/f9d492a39ebeb1a56f13ec6dd165a18a48dec812