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NVD / CVE Program· CNA Linux

CVE-2025-37812: usb: cdns3: Fix deadlock when using NCM gadget

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 09e90a9689a4aac7a2f726dc2aa472b0b37937b7, 48a62deb857f0694f611949015e70ad194d97159, 59a760e4796a3cd88d8b9d7706e0a638de677751; azl3 kernel 6.6.85.1-4 on Azure Linux 3.0 6.6.92.2-1; azl3 kernel 6.6.92.2-1 on Azure Linux 3.0 6.6.92.2-1.

Low priority for now. Upgrade to Linux Linux 09e90a9689a4aac7a2f726dc2aa472b0b37937b7, 48a62deb857f0694f611949015e70ad194d97159, 59a760e4796a3cd88d8b9d7706e0a638de677751; azl3 kernel 6.6.85.1-4 on Azure Linux 3.0 6.6.92.2-1; azl3 kernel 6.6.92.2-1 on Azure Linux 3.0 6.6.92.2-1 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: cdns3: Fix deadlock when using NCM gadget The cdns3 driver has the same NCM deadlock as fixed in cdnsp by commit 58f2fcb3a845 ("usb: cdnsp: Fix deadlock issue during using NCM gadget"). Under PREEMPT_RT the deadlock can be readily triggered by heavy network traffic, for example using "iperf --bidir" over NCM ethernet link. The deadlock occurs because the threaded interrupt handler gets preempted by a softirq, but both are protected by the same spinlock. Prevent deadlock by disabling softirq during threaded irq handler.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 8, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 5th percentile

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

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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
debiandebian linux

Affected versions

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

  • debian debian linux11.0
  • linux linux kernel5.5 and later · before 5.10.237
  • linux linux kernel5.11 and later · before 5.15.181
  • linux linux kernel5.16 and later · before 6.1.136
  • linux linux kernel5.4 and later · before 5.4.293
  • linux linux kernel6.7 and later · before 6.12.26
  • linux linux kernel6.13 and later · before 6.14.5
  • linux linux kernel6.2 and later · before 6.6.89
  • linux linux kernel6.15

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

    • 5.4affected
    • 7733f6c32e36ff9d7adadf40001039bf219b1cbe and later · before eebfb64c624fc738b669100173344fb441c5e719affected · git
    • 7733f6c32e36ff9d7adadf40001039bf219b1cbe and later · before 59a760e4796a3cd88d8b9d7706e0a638de677751affected · git
    • 7733f6c32e36ff9d7adadf40001039bf219b1cbe and later · before b96239582531775f2fdcb14de29bdb6870fd4c8caffected · git
    • 7733f6c32e36ff9d7adadf40001039bf219b1cbe and later · before c27db84ed44e50ff90d9e3a2a25fae2e0a0fa015affected · git
    • 7733f6c32e36ff9d7adadf40001039bf219b1cbe and later · before 48a62deb857f0694f611949015e70ad194d97159affected · git
    • 7733f6c32e36ff9d7adadf40001039bf219b1cbe and later · before 74cd6e408a4c010e404832f0e4609d29bf1d0c41affected · git
    • 7733f6c32e36ff9d7adadf40001039bf219b1cbe and later · before 09e90a9689a4aac7a2f726dc2aa472b0b37937b7affected · git
    • 7733f6c32e36ff9d7adadf40001039bf219b1cbe and later · before a1059896f2bfdcebcdc7153c3be2307ea319501faffected · git
    • before 5.4not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.137-16.1.137-1
Debian:13linuxbefore 6.12.27-16.12.27-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • 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

Published before and after this one in the same product

  • ← EarlierCVE-2025-37805May 8, 2025 · sound/virtio: Fix cancel_sync warnings on uninitialized work_structs
    22Monitor
  • ← EarlierCVE-2025-37810May 8, 2025 · usb: dwc3: gadget: check that event count does not exceed event buffer length
    31Monitor
  • Later →CVE-2025-37814May 8, 2025 · tty: Require CAP_SYS_ADMIN for all usages of TIOCL_SELMOUSEREPORT
    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 Linux09e90a9689a4aac7a2f726dc2aa472b0b37937b7Vendor (CNA)
Linux Linux48a62deb857f0694f611949015e70ad194d97159Vendor (CNA)
Linux Linux59a760e4796a3cd88d8b9d7706e0a638de677751Vendor (CNA)
Linux Linux74cd6e408a4c010e404832f0e4609d29bf1d0c41Vendor (CNA)
Linux Linuxa1059896f2bfdcebcdc7153c3be2307ea319501fVendor (CNA)
Linux Linuxb96239582531775f2fdcb14de29bdb6870fd4c8cVendor (CNA)
Linux Linuxc27db84ed44e50ff90d9e3a2a25fae2e0a0fa015Vendor (CNA)
Linux Linuxeebfb64c624fc738b669100173344fb441c5e719Vendor (CNA)
azl3 kernel 6.6.85.1-4 on Azure Linux 3.06.6.92.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 kernel 6.6.92.2-1 on Azure Linux 3.06.6.92.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.137-1 · 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.

No history yet (it accumulates with the daily EPSS job).

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)

CWE-667 · Improper Locking

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.

Change log

  1. Fix✗ → ✓

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

References

Show all references (9 more)

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

All records