CVE-2022-50236

System crash via uninitialized IOMMU domain dereference

Published Sep 15, 2025 · Updated Sep 15, 2025

Use of an uninitialized resource in Linux 4.6 through 6.0.16 and 6.1 through 6.1.2 allows local users to crash the system. During a kexec reboot, mtk_iommu_isr passes dom->domain to report_iommu_fault before the MediaTek IOMMU domain pointer is initialized. The flaw requires local low-privileged access, a MediaTek IOMMU platform, and the interrupt timing window; successful triggering causes an invalid kernel memory read and system crash.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of an uninitialized resource in Linux 4.6 through 6.0.16 and 6.1 through 6.1.2 allows local users to crash the system. During a kexec reboot, mtk_iommu_isr passes dom->domain to report_iommu_fault before the MediaTek IOMMU domain pointer is initialized. The flaw requires local low-privileged access, a MediaTek IOMMU platform, and the interrupt timing window; successful triggering causes an invalid kernel memory read and system crash.

The record

CVE
CVE-2022-50236
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2025Record 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <00ef8885a945c37551547d8ac8361cacd20c4e42
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <85cc8a187f2de7a91e2cea522e9406fa12999269
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f13acee780cedb3e06a6dadf64d9104cccd2b9fc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <00ef8885a945c37551547d8ac8361cacd20c4e42; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <85cc8a187f2de7a91e2cea522e9406fa12999269; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f13acee780cedb3e06a6dadf64d9104cccd2b9fc

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-908Use of Uninitialized Resource
T1499.004Endpoint Denial of Service: Application 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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