CVE-2025-40058

Nonrecoverable fault via incoherent IOMMU dirty tracking

Published Oct 28, 2025 · Updated Oct 28, 2025

Improper IOMMU configuration in Linux allows local users to trigger a nonrecoverable fault by enabling dirty page tracking. The Intel VT-d capability check marks scalable-mode accessed/dirty support from SLADS alone instead of requiring both SLADS and coherent page-walk support through SMPWC. Reachability requires Intel VT-d hardware with incoherent page walks, low-privileged local access, and a workload that enables IOMMU dirty tracking.

CVSS severity8.8
High
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

Improper IOMMU configuration in Linux allows local users to trigger a nonrecoverable fault by enabling dirty page tracking. The Intel VT-d capability check marks scalable-mode accessed/dirty support from SLADS alone instead of requiring both SLADS and coherent page-walk support through SMPWC. Reachability requires Intel VT-d hardware with incoherent page walks, low-privileged local access, and a workload that enables IOMMU dirty tracking.

The record

CVE
CVE-2025-40058
Published
Oct 28, 2025
Updated
Oct 28, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.7
  2. Affected versionversion=f35f22cc760eb2c7034bf53251399685d611e03f <57f55048e564dedd8a4546d018e29d6bbfff0a7e
  3. Affected versionversion=f35f22cc760eb2c7034bf53251399685d611e03f <8d096ce0e87bdc361f0b25d7943543bc53aa0b9e
  4. Affected versionversion=f35f22cc760eb2c7034bf53251399685d611e03f <ebe16d245a00626bb87163862a1b07daf5475a3e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.7; version=f35f22cc760eb2c7034bf53251399685d611e03f <57f55048e564dedd8a4546d018e29d6bbfff0a7e; version=f35f22cc760eb2c7034bf53251399685d611e03f <8d096ce0e87bdc361f0b25d7943543bc53aa0b9e; version=f35f22cc760eb2c7034bf53251399685d611e03f <ebe16d245a00626bb87163862a1b07daf5475a3e

Published CVSS scores

8.8Linux Kernel CNACVSS: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

T1499Endpoint Denial of Service

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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