CVE-2026-64337

DMA mapping leak via failed request queueing

Published Jul 25, 2026 · Updated Jul 25, 2026

Resource leak in the Linux Kernel mtu3 USB gadget driver allows attackers to leave request DMA mappings active via unspecified vectors. mtu3_gadget_queue() maps a request before checking QMU GPD ring capacity, then returns EAGAIN without reaching mtu3_req_complete(), which normally unmaps it. The public record identifies no direct attacker-controlled vector and does not establish that repeated failures exhaust mappings or interrupt USB service.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
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 Linux Kernel mtu3 USB gadget driver allows attackers to leave request DMA mappings active via unspecified vectors. mtu3_gadget_queue() maps a request before checking QMU GPD ring capacity, then returns EAGAIN without reaching mtu3_req_complete(), which normally unmaps it. The public record identifies no direct attacker-controlled vector and does not establish that repeated failures exhaust mappings or interrupt USB service.

The record

CVE
CVE-2026-64337
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

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=4.10
  2. Affected versionversion=df2069acb00569a6299d6e11aa1865eeba463848 <00c3fef4c2dc2c7cbd8281f8fda09d1913420f09
  3. Affected versionversion=df2069acb00569a6299d6e11aa1865eeba463848 <0bddda5a11665c210339de76d27ebbd1a2e0b43c
  4. Affected versionversion=df2069acb00569a6299d6e11aa1865eeba463848 <3cee30f1138281a1d247bb053a1ad4f7c5b04e98
  5. Affected versionversion=df2069acb00569a6299d6e11aa1865eeba463848 <4183874b7925f4a98b400cf857bea26ee87da236
  6. Affected versionversion=df2069acb00569a6299d6e11aa1865eeba463848 <835b0596d4c9bdef93f842d8f826978fb4956b74
  7. Affected versionversion=df2069acb00569a6299d6e11aa1865eeba463848 <8c29d9cfab1c3cf0d0b7fcdf9255597be30aa3e1
  8. Affected versionversion=df2069acb00569a6299d6e11aa1865eeba463848 <e8f739a3860d043dcc135371637e82f53132efe5
  9. Affected versionversion=df2069acb00569a6299d6e11aa1865eeba463848 <f3c4026524d3660c73ef2838b99776d37631e039

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.10; version=df2069acb00569a6299d6e11aa1865eeba463848 <00c3fef4c2dc2c7cbd8281f8fda09d1913420f09; version=df2069acb00569a6299d6e11aa1865eeba463848 <0bddda5a11665c210339de76d27ebbd1a2e0b43c; version=df2069acb00569a6299d6e11aa1865eeba463848 <3cee30f1138281a1d247bb053a1ad4f7c5b04e98; version=df2069acb00569a6299d6e11aa1865eeba463848 <4183874b7925f4a98b400cf857bea26ee87da236; version=df2069acb00569a6299d6e11aa1865eeba463848 <835b0596d4c9bdef93f842d8f826978fb4956b74; version=df2069acb00569a6299d6e11aa1865eeba463848 <8c29d9cfab1c3cf0d0b7fcdf9255597be30aa3e1; version=df2069acb00569a6299d6e11aa1865eeba463848 <e8f739a3860d043dcc135371637e82f53132efe5; version=df2069acb00569a6299d6e11aa1865eeba463848 <f3c4026524d3660c73ef2838b99776d37631e039

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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