CVE-2025-68235

Local denial of service via firmware memory leak

Published Dec 16, 2025 · Updated Dec 16, 2025

Memory leak in the nouveau firmware code in affected Linux kernel branches allows local users to consume kernel memory during firmware teardown. The nvkm_falcon_fw_dtor function releases other firmware resources but fails to free the allocated nvkm_falcon_fw::boot buffer. Exploitation requires local low-privileged access and execution of the affected nouveau firmware lifecycle; the documented consequence is availability loss from unreleased kernel memory.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the nouveau firmware code in affected Linux kernel branches allows local users to consume kernel memory during firmware teardown. The nvkm_falcon_fw_dtor function releases other firmware resources but fails to free the allocated nvkm_falcon_fw::boot buffer. Exploitation requires local low-privileged access and execution of the affected nouveau firmware lifecycle; the documented consequence is availability loss from unreleased kernel memory.

The record

CVE
CVE-2025-68235
Published
Dec 16, 2025
Updated
Dec 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 16, 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=2541626cfb794e57ba0575a6920826f591f7ced0 <2bba02a39bfb383bd1a95868d532c0917e38f9e7
  2. Affected versionversion=2541626cfb794e57ba0575a6920826f591f7ced0 <6492add9a3a163d5e0390428d2636adc3e61b883
  3. Affected versionversion=2541626cfb794e57ba0575a6920826f591f7ced0 <7d1977b4ae5c50e1aafc5c51500fc08bd7afd6a0
  4. Affected versionversion=2541626cfb794e57ba0575a6920826f591f7ced0 <949f1fd2225baefbea2995afa807dba5cbdb6bd3
  5. Affected versionversion=6.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2541626cfb794e57ba0575a6920826f591f7ced0 <2bba02a39bfb383bd1a95868d532c0917e38f9e7; version=2541626cfb794e57ba0575a6920826f591f7ced0 <6492add9a3a163d5e0390428d2636adc3e61b883; version=2541626cfb794e57ba0575a6920826f591f7ced0 <7d1977b4ae5c50e1aafc5c51500fc08bd7afd6a0; version=2541626cfb794e57ba0575a6920826f591f7ced0 <949f1fd2225baefbea2995afa807dba5cbdb6bd3; version=6.2

Published CVSS scores

5.5SUSECVSS: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

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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