CVE-2026-64470

Service interruption via uncanceled btusb TX URBs

Published Jul 25, 2026 · Updated Jul 25, 2026

Use-after-free in the Linux Kernel btusb driver allows local users to interrupt service after a Marvell Bluetooth probe failure. Marvell OOB wakeup setup submits TX URBs, but later probe-error paths free driver state without first canceling those asynchronous requests. Their completion callback can consequently access freed state; exposure requires affected Marvell hardware, OOB wakeup configuration, and a subsequent probe failure.

CVSS severity5.5
Medium
EPSS probability0.18%
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 btusb driver allows local users to interrupt service after a Marvell Bluetooth probe failure. Marvell OOB wakeup setup submits TX URBs, but later probe-error paths free driver state without first canceling those asynchronous requests. Their completion callback can consequently access freed state; exposure requires affected Marvell hardware, OOB wakeup configuration, and a subsequent probe failure.

The record

CVE
CVE-2026-64470
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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=4.11
  2. Affected versionversion=a4ccc9e33d2f01532bcceb621ea06bbf4db6efac <0ccb1cb0a464dab78284c34196cd3e8e18bab4c4
  3. Affected versionversion=a4ccc9e33d2f01532bcceb621ea06bbf4db6efac <1edd524de5cc8143ece9c42c466346983dc5b5ed
  4. Affected versionversion=a4ccc9e33d2f01532bcceb621ea06bbf4db6efac <631de465aba7f8ae46478bf5f598111412e8eff8
  5. Affected versionversion=a4ccc9e33d2f01532bcceb621ea06bbf4db6efac <6e1b10df890f4663cb38af9fc1c93d36747b75af
  6. Affected versionversion=a4ccc9e33d2f01532bcceb621ea06bbf4db6efac <838c917a2f16eefe68def800ebf48a2af591149a
  7. Affected versionversion=a4ccc9e33d2f01532bcceb621ea06bbf4db6efac <92c736866244340497a8a65afe2ac25354c2bf5e
  8. Affected versionversion=a4ccc9e33d2f01532bcceb621ea06bbf4db6efac <a7e941a395711791c7e98d9870c6562c2c9e9ef2
  9. Affected versionversion=a4ccc9e33d2f01532bcceb621ea06bbf4db6efac <c5b600a3c05b1a7a110d558df935a8fc8a471c79

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.11; version=a4ccc9e33d2f01532bcceb621ea06bbf4db6efac <0ccb1cb0a464dab78284c34196cd3e8e18bab4c4; version=a4ccc9e33d2f01532bcceb621ea06bbf4db6efac <1edd524de5cc8143ece9c42c466346983dc5b5ed; version=a4ccc9e33d2f01532bcceb621ea06bbf4db6efac <631de465aba7f8ae46478bf5f598111412e8eff8; version=a4ccc9e33d2f01532bcceb621ea06bbf4db6efac <6e1b10df890f4663cb38af9fc1c93d36747b75af; version=a4ccc9e33d2f01532bcceb621ea06bbf4db6efac <838c917a2f16eefe68def800ebf48a2af591149a; version=a4ccc9e33d2f01532bcceb621ea06bbf4db6efac <92c736866244340497a8a65afe2ac25354c2bf5e; version=a4ccc9e33d2f01532bcceb621ea06bbf4db6efac <a7e941a395711791c7e98d9870c6562c2c9e9ef2; version=a4ccc9e33d2f01532bcceb621ea06bbf4db6efac <c5b600a3c05b1a7a110d558df935a8fc8a471c79

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.4Amazon LinuxCVSS:3.1/AV:P/AC:H/PR:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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