CVE-2026-72443

System crash via stale MIDI URB completion

Published Aug 15, 2026 · Updated Aug 15, 2026

Use-after-free in the Linux kernel ALSA USB-audio MIDI 2.0 driver allows local users to crash the system via a malicious USB device. On a later setup failure, snd_usb_midi_v2_free() releases endpoint storage and coherent URB buffers before stopping submitted input URBs, so input_urb_complete() dereferences stale endpoint state and can requeue an owned URB. Reachability requires local control of a USB MIDI 2.0 device and the failing create path; the demonstrated consequence is a KASAN-detected kernel use-after-free that can crash the host.

CVSS severity7.0
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel ALSA USB-audio MIDI 2.0 driver allows local users to crash the system via a malicious USB device. On a later setup failure, snd_usb_midi_v2_free() releases endpoint storage and coherent URB buffers before stopping submitted input URBs, so input_urb_complete() dereferences stale endpoint state and can requeue an owned URB. Reachability requires local control of a USB MIDI 2.0 device and the failing create path; the demonstrated consequence is a KASAN-detected kernel use-after-free that can crash the host.

The record

CVE
CVE-2026-72443
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-825, T1200
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.5
  2. Affected versionversion=d9c99876868c861afd0e9ce2cea407bbc446b3c9 <3d961032a6e58fa485b3a4c0fe0f649334d887de
  3. Affected versionversion=d9c99876868c861afd0e9ce2cea407bbc446b3c9 <4c16176fc11a61b7545464cb47c98b0c8a055fcb
  4. Affected versionversion=d9c99876868c861afd0e9ce2cea407bbc446b3c9 <68286258698e15fe75073fb8d017003f8e493db1
  5. Affected versionversion=d9c99876868c861afd0e9ce2cea407bbc446b3c9 <bcdd5a7363bdd287253c406a9c0205f5722058e7
  6. Affected versionversion=d9c99876868c861afd0e9ce2cea407bbc446b3c9 <f199c8a8bdd54296d3458777e70fe82a78bd9817

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.5; version=d9c99876868c861afd0e9ce2cea407bbc446b3c9 <3d961032a6e58fa485b3a4c0fe0f649334d887de; version=d9c99876868c861afd0e9ce2cea407bbc446b3c9 <4c16176fc11a61b7545464cb47c98b0c8a055fcb; version=d9c99876868c861afd0e9ce2cea407bbc446b3c9 <68286258698e15fe75073fb8d017003f8e493db1; version=d9c99876868c861afd0e9ce2cea407bbc446b3c9 <bcdd5a7363bdd287253c406a9c0205f5722058e7; version=d9c99876868c861afd0e9ce2cea407bbc446b3c9 <f199c8a8bdd54296d3458777e70fe82a78bd9817

Published CVSS scores

7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-825Expired Pointer Dereference
T1200Hardware Additions

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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