CVE-2022-48916

Local boot crash via duplicate IOMMU insertion

Published Aug 22, 2024 · Updated May 23, 2026

Denial of service in the Linux kernel IOMMU subsystem allows local users to crash the system during boot on affected Intel hardware. In dmar_insert_one_dev_info(), VMD subdevices incorrectly receive PASID-table allocation; the failure path frees device-domain metadata that is then reused and added to the list twice. The crash requires Intel VMD and VT-d scalable mode on affected Sapphire Rapids hardware, and the reported consequence is a kernel panic rather than data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.21%
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 the Linux kernel IOMMU subsystem allows local users to crash the system during boot on affected Intel hardware. In dmar_insert_one_dev_info(), VMD subdevices incorrectly receive PASID-table allocation; the failure path frees device-domain metadata that is then reused and added to the list twice. The crash requires Intel VMD and VT-d scalable mode on affected Sapphire Rapids hardware, and the reported consequence is a kernel panic rather than data disclosure or modification.

The record

CVE
CVE-2022-48916
Published
Aug 22, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 22, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=474dd1c6506411752a9b2f2233eec11f1733a099 <2aaa085bd012a83be7104356301828585a2253ed
  2. Affected versionversion=474dd1c6506411752a9b2f2233eec11f1733a099 <b00833768e170a31af09268f7ab96aecfcca9623
  3. Affected versionversion=474dd1c6506411752a9b2f2233eec11f1733a099 <d5ad4214d9c6c6e465c192789020a091282dfee7
  4. Affected versionversion=5.12.19 <5.13
  5. Affected versionversion=5.13.4 <5.14
  6. Affected versionversion=5.14
  7. Affected versionversion=77c6a77a068c2304e3f19abee67b0c76dde4c0ea
  8. Affected versionversion=7e6a4c304debd9be7cacecbe99b3481985e0c885

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=474dd1c6506411752a9b2f2233eec11f1733a099 <2aaa085bd012a83be7104356301828585a2253ed; version=474dd1c6506411752a9b2f2233eec11f1733a099 <b00833768e170a31af09268f7ab96aecfcca9623; version=474dd1c6506411752a9b2f2233eec11f1733a099 <d5ad4214d9c6c6e465c192789020a091282dfee7; version=5.12.19 <5.13; version=5.13.4 <5.14; version=5.14; version=77c6a77a068c2304e3f19abee67b0c76dde4c0ea; version=7e6a4c304debd9be7cacecbe99b3481985e0c885

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

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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