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Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix potential memory leaks at error path for UMP open The allocation and initialization errors at alloc_midi_urbs() that is called at MIDI 2.0 / UMP device are supposed to be handled at the caller side by invoking free_midi_urbs(). However, free_midi_urbs() loops only for ep->num_urbs entries, and since ep->num_entries wasn't updated yet at the allocation / init error in alloc_midi_urbs(), this entry won't be released. The intention of free_midi_urbs() is to release the whole elements, so change the loop size to NUM_URBS to scan over all elements for fixing the missed releases. Also, the call of free_midi_urbs() is missing at snd_usb_midi_v2_open(). Although it'll be released later at reopen/close or disconnection, it's better to release immediately at the error path.

PUBLISHED Reserved 2025-12-24 | Published 2025-12-24 | Updated 2025-12-24 | Assigner Linux

Product status

Default status
unaffected

ff49d1df79aef7580fe3ac99d17c3f886655d080 (git) before f819b343aa95d24d5f7d6e06660c7f62591abc5f
affected

ff49d1df79aef7580fe3ac99d17c3f886655d080 (git) before b1757fa30ef14f254f4719bf6f7d54a4c8207216
affected

Default status
affected

6.5
affected

Any version before 6.5
unaffected

6.5.3 (semver)
unaffected

6.6 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/f819b343aa95d24d5f7d6e06660c7f62591abc5f

git.kernel.org/...c/b1757fa30ef14f254f4719bf6f7d54a4c8207216

cve.org (CVE-2023-54022)

nvd.nist.gov (CVE-2023-54022)

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Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.