CVE-2025-39997

A flaw was found in the Linux kernel's ALSA USB audio subsystem. A local attacker could exploit a race condition during the freeing of heap memory. This vulnerability, specifically in the snd_usbmidi_free function, occurs because the error timer kill happens after the endpoint is deleted, and there is a missing cleanup for Universal Serial Bus (USB) Request Blocks (URBs). This can lead to a Use-After-Free (UAF) condition, potentially causing a denial of service.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.