CVE-2024-50101

Kernel hang via non-PCI DMA alias handling

Published Nov 5, 2024 · Updated Aug 5, 2026

Improper device handling in Linux allows local users to hang the kernel through Intel VT-d IOMMU attach or detach operations. In drivers/iommu/intel/iommu.c, domain_context_clear() passes a non-PCI device to pci_for_each_dma_alias(), which treats it as a struct pci_dev and follows invalid bus pointers. Local access to device-management interfaces and affected Intel VT-d hardware are required; triggering the path can hang or crash the host and corrupt IOMMU bookkeeping.

CVSS severity7.8
High
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

Improper device handling in Linux allows local users to hang the kernel through Intel VT-d IOMMU attach or detach operations. In drivers/iommu/intel/iommu.c, domain_context_clear() passes a non-PCI device to pci_for_each_dma_alias(), which treats it as a struct pci_dev and follows invalid bus pointers. Local access to device-management interfaces and affected Intel VT-d hardware are required; triggering the path can hang or crash the host and corrupt IOMMU bookkeeping.

The record

CVE
CVE-2024-50101
Published
Nov 5, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=48f2183a4f9d3540fc5cfc8f8451621ee92c09f8 <fe2e0b6cd00abea3efac66de1da22d844364c1b0
  2. Affected versionversion=5.15.142 <5.15.169
  3. Affected versionversion=59862b869275c27beb25cda2054b59a8b5d04970 <cbfa3a83eba05240ce37839ed48280a05e8e8f6c
  4. Affected versionversion=6.1.66 <6.1.114
  5. Affected versionversion=6.6.5 <6.6.58
  6. Affected versionversion=6.7
  7. Affected versionversion=9807860f6ad446459d0446550cf4a2dc23bbee6c <0bd9a30c22afb5da203386b811ec31429d2caa78
  8. Affected versionversion=9a16ab9d640274b20813d2d17475e18d3e99d834 <04d6826ba7ba81213422276e96c90c6565169e1c
  9. Affected versionversion=9a16ab9d640274b20813d2d17475e18d3e99d834 <6e02a277f1db24fa039e23783c8921c7b0e5b1b3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=48f2183a4f9d3540fc5cfc8f8451621ee92c09f8 <fe2e0b6cd00abea3efac66de1da22d844364c1b0; version=5.15.142 <5.15.169; version=59862b869275c27beb25cda2054b59a8b5d04970 <cbfa3a83eba05240ce37839ed48280a05e8e8f6c; version=6.1.66 <6.1.114; version=6.6.5 <6.6.58; version=6.7; version=9807860f6ad446459d0446550cf4a2dc23bbee6c <0bd9a30c22afb5da203386b811ec31429d2caa78; version=9a16ab9d640274b20813d2d17475e18d3e99d834 <04d6826ba7ba81213422276e96c90c6565169e1c; version=9a16ab9d640274b20813d2d17475e18d3e99d834 <6e02a277f1db24fa039e23783c8921c7b0e5b1b3

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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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