CVE-2026-64144

Denial of service via control-URB memory leak

Published Jul 19, 2026 · Updated Jul 19, 2026

Resource leak in the btmtk driver in the Linux Kernel allows local users to exhaust memory by triggering USB control-transfer error paths. The control-URB path allocates urb->setup_packet but omits its release when usb_submit_urb fails and when a submitted URB is killed. The btmtk driver and a MediaTek USB Bluetooth device must be in use; repeated failures consume kernel memory until system service is interrupted.

CVSS severity5.5
Medium
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

Resource leak in the btmtk driver in the Linux Kernel allows local users to exhaust memory by triggering USB control-transfer error paths. The control-URB path allocates urb->setup_packet but omits its release when usb_submit_urb fails and when a submitted URB is killed. The btmtk driver and a MediaTek USB Bluetooth device must be in use; repeated failures consume kernel memory until system service is interrupted.

The record

CVE
CVE-2026-64144
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-772, CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=5.3
  2. Affected versionversion=a1c49c434e15050b5dafe3b6f5cc732d4f02d657 <0d2572bafea33c7cd1d77c6a25f25ff31a432482
  3. Affected versionversion=a1c49c434e15050b5dafe3b6f5cc732d4f02d657 <2a1905730e0c771b999906a7b509722f795563c6
  4. Affected versionversion=a1c49c434e15050b5dafe3b6f5cc732d4f02d657 <68c027c2003b0a8a1439d0301c59c6fd1eb3b844
  5. Affected versionversion=a1c49c434e15050b5dafe3b6f5cc732d4f02d657 <a0f5268c77eb73f84ba7c210ddfc54b1c73ff80c
  6. Affected versionversion=a1c49c434e15050b5dafe3b6f5cc732d4f02d657 <dd1dda6b8d6e1f4376a5b3055a04f0ecbdb4d6bd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.3; version=a1c49c434e15050b5dafe3b6f5cc732d4f02d657 <0d2572bafea33c7cd1d77c6a25f25ff31a432482; version=a1c49c434e15050b5dafe3b6f5cc732d4f02d657 <2a1905730e0c771b999906a7b509722f795563c6; version=a1c49c434e15050b5dafe3b6f5cc732d4f02d657 <68c027c2003b0a8a1439d0301c59c6fd1eb3b844; version=a1c49c434e15050b5dafe3b6f5cc732d4f02d657 <a0f5268c77eb73f84ba7c210ddfc54b1c73ff80c; version=a1c49c434e15050b5dafe3b6f5cc732d4f02d657 <dd1dda6b8d6e1f4376a5b3055a04f0ecbdb4d6bd

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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 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

CWE-772Missing Release of Resource after Effective Lifetime
CWE-401Missing Release of Memory after Effective Lifetime
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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