Bug 2521414 (CVE-2026-74642) - CVE-2026-74642 kernel: ALSA: usb: Fix UAF at delayed release of MIDI2 EPs
Summary: CVE-2026-74642 kernel: ALSA: usb: Fix UAF at delayed release of MIDI2 EPs
Keywords:
Status: NEW
Alias: CVE-2026-74642
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-22 15:44 UTC by OSIDB Bzimport
Modified: 2026-08-24 15:30 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-22 15:44:25 UTC 
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.
Comment 1 Mauro Matteo Cascella 2026-08-24 12:45:33 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026082223-CVE-2026-74642-68fd@gregkh/T
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