CVE-2026-43130

Host hard-lock via inaccessible-device ATS invalidation

Published May 6, 2026 · Updated May 6, 2026

Denial of service in the Linux kernel's Intel VT-d IOMMU allows local users to hard-lock a host during faulty PCIe device teardown. The dev-IOTLB invalidation path uses pci_dev_is_disconnected() to decide whether to issue an ATS invalidation, but that check misses fault-induced PCIe link-down and submits the request to an inaccessible device. Reachability requires scalable-mode Intel VT-d with ATS/PASID and a faulted or link-down PCIe device during a teardown path such as VM resource release.

CVSS severity5.5
Medium
EPSS probability0.12%
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's Intel VT-d IOMMU allows local users to hard-lock a host during faulty PCIe device teardown. The dev-IOTLB invalidation path uses pci_dev_is_disconnected() to decide whether to issue an ATS invalidation, but that check misses fault-induced PCIe link-down and submits the request to an inaccessible device. Reachability requires scalable-mode Intel VT-d with ATS/PASID and a faulted or link-down PCIe device during a teardown path such as VM resource release.

The record

CVE
CVE-2026-43130
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=025bc6b41e020aeb1e71f84ae3ffce945026de05
  2. Affected versionversion=2b74b2a92e524d7c8dec8e02e95ecf18b667c062 <01aed2f1d7cb8fdf4c60c5bb4727608cb82b401d
  3. Affected versionversion=34a7b30f56d30114bf4d436e4dc793afe326fbcf <ead67d0378e90f419e385a43af29435242d80c12
  4. Affected versionversion=4fc82cd907ac075648789cc3a00877778aa1838b <0da6697e577023d8867c7beb2d16a22510e4eea9
  5. Affected versionversion=4fc82cd907ac075648789cc3a00877778aa1838b <10e60d87813989e20eac1f3eda30b3bae461e7f9
  6. Affected versionversion=4fc82cd907ac075648789cc3a00877778aa1838b <9813306610d0d718c863aaa70928bf57d7570ec0
  7. Affected versionversion=4fc82cd907ac075648789cc3a00877778aa1838b <9deaacc8dcaddb6ddc5b52e1e63b457450ec0f94
  8. Affected versionversion=6.9
  9. Affected versionversion=c04f2780919f20e2cc4846764221f5e802555868
  10. Affected versionversion=d70f1c85113cd8c2aa8373f491ca5d1b22ec0554 <e2c78c69f8faf2885ea4ceee08c71ac738f401a0
  11. Affected versionversion=f873b85ec762c5a6abe94a7ddb31df5d3ba07d85 <581ce094d9eafb78ec4f9de77bd24b780c151236

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=025bc6b41e020aeb1e71f84ae3ffce945026de05; version=2b74b2a92e524d7c8dec8e02e95ecf18b667c062 <01aed2f1d7cb8fdf4c60c5bb4727608cb82b401d; version=34a7b30f56d30114bf4d436e4dc793afe326fbcf <ead67d0378e90f419e385a43af29435242d80c12; version=4fc82cd907ac075648789cc3a00877778aa1838b <0da6697e577023d8867c7beb2d16a22510e4eea9; version=4fc82cd907ac075648789cc3a00877778aa1838b <10e60d87813989e20eac1f3eda30b3bae461e7f9; version=4fc82cd907ac075648789cc3a00877778aa1838b <9813306610d0d718c863aaa70928bf57d7570ec0; version=4fc82cd907ac075648789cc3a00877778aa1838b <9deaacc8dcaddb6ddc5b52e1e63b457450ec0f94; version=6.9; version=c04f2780919f20e2cc4846764221f5e802555868; version=d70f1c85113cd8c2aa8373f491ca5d1b22ec0554 <e2c78c69f8faf2885ea4ceee08c71ac738f401a0; version=f873b85ec762c5a6abe94a7ddb31df5d3ba07d85 <581ce094d9eafb78ec4f9de77bd24b780c151236

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

T1499.004Endpoint Denial of Service: Application 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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