CVE-2024-40926

Local denial of service via uninitialized HPD work

Published Jul 12, 2024 · Updated May 11, 2026

Denial of service in Linux 6.7 through 6.9.5 allows local users to trigger a kernel BUG during runtime power-management resume. On headless NVIDIA cards, nouveau leaves hpd_work and hpd_lock uninitialized but schedules hpd_work when runtime power management resumes. Exploitation requires local low-privileged access, a card without display hardware, and a runtime resume; the resulting BUG interrupts the host.

CVSS severity5.5
Medium
EPSS probability0.24%
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 6.7 through 6.9.5 allows local users to trigger a kernel BUG during runtime power-management resume. On headless NVIDIA cards, nouveau leaves hpd_work and hpd_lock uninitialized but schedules hpd_work when runtime power management resumes. Exploitation requires local low-privileged access, a card without display hardware, and a runtime resume; the resulting BUG interrupts the host.

The record

CVE
CVE-2024-40926
Published
Jul 12, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908, T1499.004
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=6.7
  2. Affected versionversion=ae1aadb1eb8d3cbc52e42bee71d67bd4a71f9f07 <227349998e5740f14d531b0f0d704e66b1ed3c2f
  3. Affected versionversion=ae1aadb1eb8d3cbc52e42bee71d67bd4a71f9f07 <b96a225377b6602299a03d2ce3c289b68cd41bb7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.7; version=ae1aadb1eb8d3cbc52e42bee71d67bd4a71f9f07 <227349998e5740f14d531b0f0d704e66b1ed3c2f; version=ae1aadb1eb8d3cbc52e42bee71d67bd4a71f9f07 <b96a225377b6602299a03d2ce3c289b68cd41bb7

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-908Use of Uninitialized Resource
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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