CVE-2024-36944

Local boot hang via QXL lock cycle

Published May 30, 2024 · Updated May 11, 2026

Improper locking in the Linux kernel QXL DRM driver allows local users to hang a QXL-backed virtual machine during boot. The qxl_fence_wait change waits for a QXL fence in a path where debugging identified a circular dependency between console-owner and worker-pool locking. Reachability requires local low-privileged access to a Linux guest using QXL; the bounded consequence is a boot hang, with no reported data access or modification.

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

What happened

Improper locking in the Linux kernel QXL DRM driver allows local users to hang a QXL-backed virtual machine during boot. The qxl_fence_wait change waits for a QXL fence in a path where debugging identified a circular dependency between console-owner and worker-pool locking. Reachability requires local low-privileged access to a Linux guest using QXL; the bounded consequence is a boot hang, with no reported data access or modification.

The record

CVE
CVE-2024-36944
Published
May 30, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 30, 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=07ed11afb68d94eadd4ffc082b97c2331307c5ea <3628e0383dd349f02f882e612ab6184e4bb3dc10
  2. Affected versionversion=13ab5db42a593f9904acc39055ee3ae75963fc88 <3dfe35d8683daf9ba69278643efbabe40000bbf6
  3. Affected versionversion=42cbe04a5c77da74fb7161b0ae63f1f6e105d633 <148ed8b4d64f94ab079c8f0d88c3f444db97ba97
  4. Affected versionversion=5.15.156 <5.15.159
  5. Affected versionversion=6.1.87 <6.1.91
  6. Affected versionversion=6.6.28 <6.6.31
  7. Affected versionversion=6.8.7 <6.8.10
  8. Affected versionversion=84fb60063509e462e39c0e097c7d6dbb71c95967 <b548c53bc3ab83dc6fc86c8e840f013b2032267a
  9. Affected versionversion=8d278fc34cdd8a44e995fa93dfd31d619a2e1fe6 <4a89ac4b0921c4ea21eb1b4cf3a469a91bacfcea

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=07ed11afb68d94eadd4ffc082b97c2331307c5ea <3628e0383dd349f02f882e612ab6184e4bb3dc10; version=13ab5db42a593f9904acc39055ee3ae75963fc88 <3dfe35d8683daf9ba69278643efbabe40000bbf6; version=42cbe04a5c77da74fb7161b0ae63f1f6e105d633 <148ed8b4d64f94ab079c8f0d88c3f444db97ba97; version=5.15.156 <5.15.159; version=6.1.87 <6.1.91; version=6.6.28 <6.6.31; version=6.8.7 <6.8.10; version=84fb60063509e462e39c0e097c7d6dbb71c95967 <b548c53bc3ab83dc6fc86c8e840f013b2032267a; version=8d278fc34cdd8a44e995fa93dfd31d619a2e1fe6 <4a89ac4b0921c4ea21eb1b4cf3a469a91bacfcea

Published CVSS scores

5.5CISA-ADPCVSS: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 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-667Improper Locking

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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