CVE-2025-37866

Kernel warning via misaligned sysfs buffer

Published May 9, 2025 · Updated May 11, 2026

Denial of service in Linux 6.14 through 6.14.3 allows local users to trigger a kernel warning on NVIDIA BlueField systems. The mlxbf-bootctl secure_boot_fuse_state_show() path calls sysfs_emit() with a destination pointer advanced beyond the page start while emitting fuse-state entries. A low-privileged read of the BlueField-only secure_boot_fuse_state sysfs attribute reaches the faulty offset handling; no data loss or code execution is reported.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux 6.14 through 6.14.3 allows local users to trigger a kernel warning on NVIDIA BlueField systems. The mlxbf-bootctl secure_boot_fuse_state_show() path calls sysfs_emit() with a destination pointer advanced beyond the page start while emitting fuse-state entries. A low-privileged read of the BlueField-only secure_boot_fuse_state sysfs attribute reaches the faulty offset handling; no data loss or code execution is reported.

The record

CVE
CVE-2025-37866
Published
May 9, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 9, 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=6.14
  2. Affected versionversion=9886f575de5aefcfab537467c72e5176e5301df0 <5e1dcc5bfd7a2896178c604bc69d6ab9650967da
  3. Affected versionversion=9886f575de5aefcfab537467c72e5176e5301df0 <b129005ddfc0e6daf04a6d3b928a9e474f9b3918

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.14; version=9886f575de5aefcfab537467c72e5176e5301df0 <5e1dcc5bfd7a2896178c604bc69d6ab9650967da; version=9886f575de5aefcfab537467c72e5176e5301df0 <b129005ddfc0e6daf04a6d3b928a9e474f9b3918

Published CVSS scores

5.5NIST NVDCVSS: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 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

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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