CVE-2026-52964

Out-of-bounds read via malformed MIDI descriptor

Published Jun 24, 2026 · Updated Jun 24, 2026

Out-of-bounds read in the Linux kernel allows physically proximate attackers to trigger invalid memory reads via a malformed USB MIDI 2.0 device. The ALSA USB MIDI 2.0 endpoint parser checks bLength against bNumGrpTrmBlock but not against the bytes remaining in the endpoint-extra scan before reading baAssoGrpTrmBlkID[]. Reachability requires attaching a malformed USB MIDI 2.0 device; the published record does not specify whether the invalid read is externally observable or causes a crash.

CVSS severity7.1
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the Linux kernel allows physically proximate attackers to trigger invalid memory reads via a malformed USB MIDI 2.0 device. The ALSA USB MIDI 2.0 endpoint parser checks bLength against bNumGrpTrmBlock but not against the bytes remaining in the endpoint-extra scan before reading baAssoGrpTrmBlkID[]. Reachability requires attaching a malformed USB MIDI 2.0 device; the published record does not specify whether the invalid read is externally observable or causes a crash.

The record

CVE
CVE-2026-52964
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1200
Attack vector
physical
Privileges
Unavailable

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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 <17e76b19de1aff5ff4de64d269290bd1b07a01d3
  3. Affected versionversion=ff49d1df79aef7580fe3ac99d17c3f886655d080 <918be519c7876329e1b6e2ea1c59f0b75e792dca
  4. Affected versionversion=ff49d1df79aef7580fe3ac99d17c3f886655d080 <a310b4bebda5e4a1b26520c0cc5145ccd6d617e2
  5. Affected versionversion=ff49d1df79aef7580fe3ac99d17c3f886655d080 <f9c184a83574549a36ea69b755f650e57d164c78
  6. Affected versionversion=ff49d1df79aef7580fe3ac99d17c3f886655d080 <fafc97bd01e4c737eaeafadfdadb1af4bbfa7307

What conditions does exploitation require?

Attack vectorphysical
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.5; version=ff49d1df79aef7580fe3ac99d17c3f886655d080 <17e76b19de1aff5ff4de64d269290bd1b07a01d3; version=ff49d1df79aef7580fe3ac99d17c3f886655d080 <918be519c7876329e1b6e2ea1c59f0b75e792dca; version=ff49d1df79aef7580fe3ac99d17c3f886655d080 <a310b4bebda5e4a1b26520c0cc5145ccd6d617e2; version=ff49d1df79aef7580fe3ac99d17c3f886655d080 <f9c184a83574549a36ea69b755f650e57d164c78; version=ff49d1df79aef7580fe3ac99d17c3f886655d080 <fafc97bd01e4c737eaeafadfdadb1af4bbfa7307

Published CVSS scores

7.1SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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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