CVE-2025-37990

Service interruption via unchecked USB command failure

Published May 20, 2025 · Updated May 11, 2026

Use of uninitialized state in the Linux kernel brcmfmac USB Wi-Fi driver allows local users to interrupt system availability. brcmf_usb_dl_writeimage ignores a failed brcmf_usb_dl_cmd call, then evaluates the uninitialized state.state and state.bytes fields. Low-privileged local access and a failing Broadcom USB firmware-download command are required; no data disclosure or modification is reported.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of uninitialized state in the Linux kernel brcmfmac USB Wi-Fi driver allows local users to interrupt system availability. brcmf_usb_dl_writeimage ignores a failed brcmf_usb_dl_cmd call, then evaluates the uninitialized state.state and state.bytes fields. Low-privileged local access and a failing Broadcom USB firmware-download command are required; no data disclosure or modification is reported.

The record

CVE
CVE-2025-37990
Published
May 20, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=3.4
  2. Affected versionversion=71bb244ba2fd5390eefe4ee9054abdb3f8b05922 <08424a0922fb9e32a19b09d852ee87fb6c497538
  3. Affected versionversion=71bb244ba2fd5390eefe4ee9054abdb3f8b05922 <508be7c001437bacad7b9a43f08a723887bcd1ea
  4. Affected versionversion=71bb244ba2fd5390eefe4ee9054abdb3f8b05922 <524b70441baba453b193c418e3142bd31059cc1f
  5. Affected versionversion=71bb244ba2fd5390eefe4ee9054abdb3f8b05922 <62a4f2955d9a1745bdb410bf83fb16666d8865d6
  6. Affected versionversion=71bb244ba2fd5390eefe4ee9054abdb3f8b05922 <8e089e7b585d95122c8122d732d1d5ef8f879396
  7. Affected versionversion=71bb244ba2fd5390eefe4ee9054abdb3f8b05922 <972bf75e53f778c78039c5d139dd47443a6d66a1
  8. Affected versionversion=71bb244ba2fd5390eefe4ee9054abdb3f8b05922 <bdb435ef9815b1ae28eefffa01c6959d0fcf1fa7
  9. Affected versionversion=71bb244ba2fd5390eefe4ee9054abdb3f8b05922 <fa9b9f02212574ee1867fbefb0a675362a71b31d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.4; version=71bb244ba2fd5390eefe4ee9054abdb3f8b05922 <08424a0922fb9e32a19b09d852ee87fb6c497538; version=71bb244ba2fd5390eefe4ee9054abdb3f8b05922 <508be7c001437bacad7b9a43f08a723887bcd1ea; version=71bb244ba2fd5390eefe4ee9054abdb3f8b05922 <524b70441baba453b193c418e3142bd31059cc1f; version=71bb244ba2fd5390eefe4ee9054abdb3f8b05922 <62a4f2955d9a1745bdb410bf83fb16666d8865d6; version=71bb244ba2fd5390eefe4ee9054abdb3f8b05922 <8e089e7b585d95122c8122d732d1d5ef8f879396; version=71bb244ba2fd5390eefe4ee9054abdb3f8b05922 <972bf75e53f778c78039c5d139dd47443a6d66a1; version=71bb244ba2fd5390eefe4ee9054abdb3f8b05922 <bdb435ef9815b1ae28eefffa01c6959d0fcf1fa7; version=71bb244ba2fd5390eefe4ee9054abdb3f8b05922 <fa9b9f02212574ee1867fbefb0a675362a71b31d

Published CVSS scores

5.5NVDCVSS: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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-908Use of Uninitialized Resource
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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