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CVE-2026-64337· NVD / CVE Program· CNA Linux

usb: mtu3: unmap request DMA on queue failure

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.16% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 00c3fef4c2dc2c7cbd8281f8fda09d1913420f09, 0bddda5a11665c210339de76d27ebbd1a2e0b43c, 3cee30f1138281a1d247bb053a1ad4f7c5b04e98.

Low priority for now. Upgrade to Linux Linux 00c3fef4c2dc2c7cbd8281f8fda09d1913420f09, 0bddda5a11665c210339de76d27ebbd1a2e0b43c, 3cee30f1138281a1d247bb053a1ad4f7c5b04e98 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: usb: mtu3: unmap request DMA on queue failure mtu3_gadget_queue() maps the request before checking whether the QMU GPD ring can accept another transfer. the request is returned with -EAGAIN before it is linked on the endpoint request list if mtu3_prepare_transfer() fails. Normal completion and dequeue paths unmap requests from mtu3_req_complete(), but this error path never reaches that helper, so the DMA mapping is left active. Unmap the request before returning from the failed queue path.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jul 25, 2026
Updated
Sep 3, 2026
EPSS
0.1% · 4th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel4.10 and later · before 5.10.261
  • linux linux kernel5.11 and later · before 5.15.212
  • linux linux kernel5.16 and later · before 6.1.178
  • linux linux kernel6.2 and later · before 6.6.145
  • linux linux kernel6.7 and later · before 6.12.96
  • linux linux kernel6.13 and later · before 6.18.39
  • linux linux kernel6.19 and later · before 7.1.4
  • linux linux kernel7.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.10affected
    • df2069acb00569a6299d6e11aa1865eeba463848 and later · before 3cee30f1138281a1d247bb053a1ad4f7c5b04e98affected · git
    • df2069acb00569a6299d6e11aa1865eeba463848 and later · before f3c4026524d3660c73ef2838b99776d37631e039affected · git
    • df2069acb00569a6299d6e11aa1865eeba463848 and later · before e8f739a3860d043dcc135371637e82f53132efe5affected · git
    • df2069acb00569a6299d6e11aa1865eeba463848 and later · before 4183874b7925f4a98b400cf857bea26ee87da236affected · git
    • df2069acb00569a6299d6e11aa1865eeba463848 and later · before 00c3fef4c2dc2c7cbd8281f8fda09d1913420f09affected · git
    • df2069acb00569a6299d6e11aa1865eeba463848 and later · before 8c29d9cfab1c3cf0d0b7fcdf9255597be30aa3e1affected · git
    • df2069acb00569a6299d6e11aa1865eeba463848 and later · before 835b0596d4c9bdef93f842d8f826978fb4956b74affected · git
    • df2069acb00569a6299d6e11aa1865eeba463848 and later · before 0bddda5a11665c210339de76d27ebbd1a2e0b43caffected · git
    • before 4.10not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:12linux-6.12before 6.12.100-1~deb12u16.12.100-1~deb12u1
Debian:13linuxbefore 6.12.96-16.12.96-1
Debian:14linuxbefore 7.1.4-17.1.4-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-64335Jul 25, 2026 · USB: serial: digi_acceleport: fix broken rx after throttle
    22Monitor
  • ← EarlierCVE-2026-64336Jul 25, 2026 · USB: serial: keyspan_pda: fix information leak
    22Monitor
  • Later →CVE-2026-64338Jul 25, 2026 · USB: misc: uss720: unregister parport on probe failure
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux00c3fef4c2dc2c7cbd8281f8fda09d1913420f09Vendor (CNA)
Linux Linux0bddda5a11665c210339de76d27ebbd1a2e0b43cVendor (CNA)
Linux Linux3cee30f1138281a1d247bb053a1ad4f7c5b04e98Vendor (CNA)
Linux Linux4183874b7925f4a98b400cf857bea26ee87da236Vendor (CNA)
Linux Linux835b0596d4c9bdef93f842d8f826978fb4956b74Vendor (CNA)
Linux Linux8c29d9cfab1c3cf0d0b7fcdf9255597be30aa3e1Vendor (CNA)
Linux Linuxe8f739a3860d043dcc135371637e82f53132efe5Vendor (CNA)
Linux Linuxf3c4026524d3660c73ef2838b99776d37631e039Vendor (CNA)
debian:linux6.1.180-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.100-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records