CVE-2026-74501

CVE CVE-2026-74501EUVD EUVD-2026-59694Published 2026-08-15T12:27:26.000ZLast changed 2026-08-17T05:20:39.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: fix use-after-free in ump_to_endpoint() create_midi2_ump() registers a card-owned snd_ump_endpoint and stores a back-pointer to its per-interface snd_usb_midi2_ump object in ump->private_data, but it never installs an ump->private_free hook and never clears that pointer. If a later step of snd_usb_midi_v2_create() fails, its error path calls free_all_midi2_umps(), which kfree()s the snd_usb_midi2_ump object while the already-registered endpoint keeps pointing at it. The created /dev/snd/umpC*D* node stays exposed, so the first operation of any UMP open, ump_to_endpoint(), dereferences the dangling ump->private_data and reads rmidi->eps[dir] out of freed memory. A malicious USB MIDI 2.0 device that makes creation fail after the endpoint is registered can thus trigger a slab use-after-free read on a subsequent open of the UMP node. Clear the endpoint's back-pointer before freeing the object, and let ump_to_endpoint() tolerate a NULL private_data so the open/close/trigger callbacks fail cleanly (their callers already handle a NULL endpoint) instead of dereferencing a stale pointer. Discovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 7.2; patch: 0; patch: 6.18.44; patch: 6.12.103; ff49d1df79aef7580fe3ac99d17c3f886655d080 <4a05b2d1b4642df74f30b6f54843e825c4a2bfd3; patch: 6.6.151; 6.5; ff49d1df79aef7580fe3ac99d17c3f886655d080 <8a7a33b846d6ba695891b8d0040027cdbad8cd52; ff49d1df79aef7580fe3ac99d17c3f886655d080 <cc014ebf803174f0e5d15956dfc5a38413c945ae; patch: 7.1.8; ff49d1df79aef7580fe3ac99d17c3f886655d080 <ae388c0e1bf727972096f770f82d12e4f748d1b6; ff49d1df79aef7580fe3ac99d17c3f886655d080 <49eccef6d6e1c00dac6fb2e7eb6f9206c33e1c37

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

Does this concern one of your customers?

This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.

Try it for 28 days

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.