CVE-2026-74501

Freed-memory read via dangling UMP endpoint pointer

Published Aug 15, 2026 · Updated Aug 15, 2026

Use-after-free in Linux kernel ALSA USB audio allows physically proximate attackers to trigger a freed-memory read with a USB MIDI device. After create_midi2_ump() registers an endpoint, a later creation failure frees snd_usb_midi2_ump without clearing ump->private_data; ump_to_endpoint() then dereferences the dangling pointer when the exposed UMP node is opened. Exploitation requires a malicious USB MIDI 2.0 device to force that failure and a subsequent UMP-node open, bounding the demonstrated effect to a slab use-after-free read.

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 Linux kernel ALSA USB audio allows physically proximate attackers to trigger a freed-memory read with a USB MIDI device. After create_midi2_ump() registers an endpoint, a later creation failure frees snd_usb_midi2_ump without clearing ump->private_data; ump_to_endpoint() then dereferences the dangling pointer when the exposed UMP node is opened. Exploitation requires a malicious USB MIDI 2.0 device to force that failure and a subsequent UMP-node open, bounding the demonstrated effect to a slab use-after-free read.

The record

CVE
CVE-2026-74501
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1200
Attack vector
physical
Privileges
Unavailable

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=ff49d1df79aef7580fe3ac99d17c3f886655d080 <49eccef6d6e1c00dac6fb2e7eb6f9206c33e1c37
  3. Affected versionversion=ff49d1df79aef7580fe3ac99d17c3f886655d080 <4a05b2d1b4642df74f30b6f54843e825c4a2bfd3
  4. Affected versionversion=ff49d1df79aef7580fe3ac99d17c3f886655d080 <8a7a33b846d6ba695891b8d0040027cdbad8cd52
  5. Affected versionversion=ff49d1df79aef7580fe3ac99d17c3f886655d080 <ae388c0e1bf727972096f770f82d12e4f748d1b6
  6. Affected versionversion=ff49d1df79aef7580fe3ac99d17c3f886655d080 <cc014ebf803174f0e5d15956dfc5a38413c945ae

What conditions does exploitation require?

Attack vectorphysical
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.5; version=ff49d1df79aef7580fe3ac99d17c3f886655d080 <49eccef6d6e1c00dac6fb2e7eb6f9206c33e1c37; version=ff49d1df79aef7580fe3ac99d17c3f886655d080 <4a05b2d1b4642df74f30b6f54843e825c4a2bfd3; version=ff49d1df79aef7580fe3ac99d17c3f886655d080 <8a7a33b846d6ba695891b8d0040027cdbad8cd52; version=ff49d1df79aef7580fe3ac99d17c3f886655d080 <ae388c0e1bf727972096f770f82d12e4f748d1b6; version=ff49d1df79aef7580fe3ac99d17c3f886655d080 <cc014ebf803174f0e5d15956dfc5a38413c945ae

Published CVSS scores

7.0OracleCVSS: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)
Vectorphysical
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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