CVE-2025-40289

Kernel crash via exposed VRAM sysfs attributes

Published Dec 6, 2025 · Updated May 11, 2026

Denial of service in affected Linux kernel releases allows local users to crash the system by accessing amdgpu VRAM sysfs attributes. The amdgpu_vram_attrs_is_visible callback returns the attributes' modes without checking whether the VRAM resource manager is in use. A local account and an AMD GPU with no VRAM are required; reading an exposed attribute can trigger a kernel crash, with no reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.18%
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 affected Linux kernel releases allows local users to crash the system by accessing amdgpu VRAM sysfs attributes. The amdgpu_vram_attrs_is_visible callback returns the attributes' modes without checking whether the VRAM resource manager is in use. A local account and an AMD GPU with no VRAM are required; reading an exposed attribute can trigger a kernel crash, with no reported data disclosure or modification.

The record

CVE
CVE-2025-40289
Published
Dec 6, 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. Dec 6, 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=4.2
  2. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <33cc891b56b93cad1a83263eaf2e417436f70c82
  3. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <39a1c8c860e32d775f29917939e87b6a7c08ebb1
  4. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <a67a9f99ce1306898d7129a199d42876bc06a0f0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.2; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <33cc891b56b93cad1a83263eaf2e417436f70c82; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <39a1c8c860e32d775f29917939e87b6a7c08ebb1; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <a67a9f99ce1306898d7129a199d42876bc06a0f0

Published CVSS scores

5.5Amazon LinuxCVSS: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

T1499.004Endpoint Denial of Service: Application 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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