CVE-2025-65001

Privileged code execution via out-of-bounds request write

Published Nov 12, 2025 · Updated Nov 12, 2025

Out-of-bounds write in Fujitsu BIOS Driver before 2.5.0.0 allows local users to execute code or crash the system via a crafted request. The fbiosdrv.sys kernel driver processes the request with an undisclosed bounds-checking error that writes beyond its intended buffer. Administrative privileges are required, and Fujitsu has not disclosed the request interface, affected operation, or resulting execution context.

CVSS severity9.3
Critical
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Fujitsu BIOS Driver before 2.5.0.0 allows local users to execute code or crash the system via a crafted request. The fbiosdrv.sys kernel driver processes the request with an undisclosed bounds-checking error that writes beyond its intended buffer. Administrative privileges are required, and Fujitsu has not disclosed the request interface, affected operation, or resulting execution context.

The record

CVE
CVE-2025-65001
Published
Nov 12, 2025
Updated
Nov 12, 2025
Vendor
Fujitsu Limited
Product
Fujitsu BIOS Driver
Classifications
CWE-787
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Nov 12, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 12, 2025Record 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=0 <2.5.0.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Fujitsu Limited · Fujitsu BIOS Driverversion=0 <2.5.0.0

Published CVSS scores

9.3JPCERT/CC and IPACVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
8.2MITRECVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

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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