CVE-2026-53053

Device isolation bypass via incorrect DTE cloning

Published Jun 24, 2026 · Updated Jun 24, 2026

AMD IOMMU isolation failure in affected Linux Kernel releases allows local users to corrupt device translation state through PCI DMA aliases. clone_alias() treats its callback pdev argument as the original device and derives the source devid from it, so topology-dependent alias callbacks copy a wrong or stale DTE. Reachability requires an AMD IOMMU, a PCI device with DMA aliases, and local control of an assigned device; the resulting DTE can expose or alter memory across the intended isolation boundary or interrupt service.

CVSS severity8.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

AMD IOMMU isolation failure in affected Linux Kernel releases allows local users to corrupt device translation state through PCI DMA aliases. clone_alias() treats its callback pdev argument as the original device and derives the source devid from it, so topology-dependent alias callbacks copy a wrong or stale DTE. Reachability requires an AMD IOMMU, a PCI device with DMA aliases, and local control of an assigned device; the resulting DTE can expose or alter memory across the intended isolation boundary or interrupt service.

The record

CVE
CVE-2026-53053
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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=1f03a258f20f1699ede29bb40804074db9398a0d
  2. Affected versionversion=3332364e4ebc0581d133a334645a20fd13b580f1 <20b3c566e2702e5d4d0545be8a97029a2eebcc0e
  3. Affected versionversion=3332364e4ebc0581d133a334645a20fd13b580f1 <dae251ff11d2d2208a029f98923756831cefec46
  4. Affected versionversion=3332364e4ebc0581d133a334645a20fd13b580f1 <dbd76a537d8cb814e7f5b795ab21ecb7949c821d
  5. Affected versionversion=3332364e4ebc0581d133a334645a20fd13b580f1 <faad224fe0f0857a04ff2eb3c90f0de57f47d0f3
  6. Affected versionversion=5.4.17 <5.5
  7. Affected versionversion=5.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1f03a258f20f1699ede29bb40804074db9398a0d; version=3332364e4ebc0581d133a334645a20fd13b580f1 <20b3c566e2702e5d4d0545be8a97029a2eebcc0e; version=3332364e4ebc0581d133a334645a20fd13b580f1 <dae251ff11d2d2208a029f98923756831cefec46; version=3332364e4ebc0581d133a334645a20fd13b580f1 <dbd76a537d8cb814e7f5b795ab21ecb7949c821d; version=3332364e4ebc0581d133a334645a20fd13b580f1 <faad224fe0f0857a04ff2eb3c90f0de57f47d0f3; version=5.4.17 <5.5; version=5.5

Published CVSS scores

8.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/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

No sourced classifications are available.

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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