CVE-2024-40987

System crash via unchecked GPU voltage index

Published Jul 12, 2024 · Updated May 11, 2026

An out-of-bounds write in the Linux kernel amdgpu driver allows local users to crash affected systems through invalid voltage indices. The sumo_construct_vid_mapping_table function uses usVoltageIndex to select a vid_mapping_table entry without first ensuring that the index is below SUMO_MAX_NUMBER_VOLTAGES. The legacy AMD GPU power-management path and low-privileged local access are required, and the published consequence is a system crash without data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds write in the Linux kernel amdgpu driver allows local users to crash affected systems through invalid voltage indices. The sumo_construct_vid_mapping_table function uses usVoltageIndex to select a vid_mapping_table entry without first ensuring that the index is below SUMO_MAX_NUMBER_VOLTAGES. The legacy AMD GPU power-management path and low-privileged local access are required, and the published consequence is a system crash without data disclosure or modification.

The record

CVE
CVE-2024-40987
Published
Jul 12, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 12, 2024CVE 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=a2e73f56fa6282481927ec43aa9362c03c2e2104 <1c44f7759a5650acf8f13d3e0a184d09e03be9e4
  3. Affected versionversion=a2e73f56fa6282481927ec43aa9362c03c2e2104 <4ad7d49059358ceadd352b4e2511425bdb68f400
  4. Affected versionversion=a2e73f56fa6282481927ec43aa9362c03c2e2104 <4d020c1dbd2b2304f44d003e6de956ae570049dc
  5. Affected versionversion=a2e73f56fa6282481927ec43aa9362c03c2e2104 <b065d79ed06a0bb4377bc6dcc2ff0cb1f55a798f
  6. Affected versionversion=a2e73f56fa6282481927ec43aa9362c03c2e2104 <b0d612619ed70cab476c77b19e00d13aa414e14f
  7. Affected versionversion=a2e73f56fa6282481927ec43aa9362c03c2e2104 <d8a04a6bfa75251ba7bcc3651ed211e82f13f388
  8. Affected versionversion=a2e73f56fa6282481927ec43aa9362c03c2e2104 <f0d576f840153392d04b2d52cf3adab8f62e8cb6
  9. Affected versionversion=a2e73f56fa6282481927ec43aa9362c03c2e2104 <fc5cb952e6723c5c55e47b8cf94a891bd4af1a86

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.2; version=a2e73f56fa6282481927ec43aa9362c03c2e2104 <1c44f7759a5650acf8f13d3e0a184d09e03be9e4; version=a2e73f56fa6282481927ec43aa9362c03c2e2104 <4ad7d49059358ceadd352b4e2511425bdb68f400; version=a2e73f56fa6282481927ec43aa9362c03c2e2104 <4d020c1dbd2b2304f44d003e6de956ae570049dc; version=a2e73f56fa6282481927ec43aa9362c03c2e2104 <b065d79ed06a0bb4377bc6dcc2ff0cb1f55a798f; version=a2e73f56fa6282481927ec43aa9362c03c2e2104 <b0d612619ed70cab476c77b19e00d13aa414e14f; version=a2e73f56fa6282481927ec43aa9362c03c2e2104 <d8a04a6bfa75251ba7bcc3651ed211e82f13f388; version=a2e73f56fa6282481927ec43aa9362c03c2e2104 <f0d576f840153392d04b2d52cf3adab8f62e8cb6; version=a2e73f56fa6282481927ec43aa9362c03c2e2104 <fc5cb952e6723c5c55e47b8cf94a891bd4af1a86

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.

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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-787Out-of-bounds Write
T1499Endpoint Denial of Service

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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