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NVD / CVE Program· CNA Linux

CVE-2026-43130: iommu/vt-d: Flush dev-IOTLB only when PCIe device is accessible in scalable mode

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.12% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 01aed2f1d7cb8fdf4c60c5bb4727608cb82b401d, 0da6697e577023d8867c7beb2d16a22510e4eea9, 10e60d87813989e20eac1f3eda30b3bae461e7f9.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 01aed2f1d7cb8fdf4c60c5bb4727608cb82b401d, 0da6697e577023d8867c7beb2d16a22510e4eea9, 10e60d87813989e20eac1f3eda30b3bae461e7f9 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Flush dev-IOTLB only when PCIe device is accessible in scalable mode Commit 4fc82cd907ac ("iommu/vt-d: Don't issue ATS Invalidation request when device is disconnected") relies on pci_dev_is_disconnected() to skip ATS invalidation for safely-removed devices, but it does not cover link-down caused by faults, which can still hard-lock the system. For example, if a VM fails to connect to the PCIe device, "virsh destroy" is executed to release resources and isolate the fault, but a hard-lockup occurs while releasing the group fd. Call Trace: qi_submit_sync qi_flush_dev_iotlb intel_pasid_tear_down_entry device_block_translation blocking_domain_attach_dev __iommu_attach_device __iommu_device_set_domain __iommu_group_set_domain_internal iommu_detach_group vfio_iommu_type1_detach_group vfio_group_detach_container vfio_group_fops_release __fput Although pci_device_is_present() is slower than pci_dev_is_disconnected(), it still takes only ~70 µs on a ConnectX-5 (8 GT/s, x2) and becomes even faster as PCIe speed and width increase. Besides, devtlb_invalidation_with_pasid() is called only in the paths below, which are far less frequent than memory map/unmap. 1. mm-struct release 2. {attach,release}_dev 3. set/remove PASID 4. dirty-tracking setup The gain in system stability far outweighs the negligible cost of using pci_device_is_present() instead of pci_dev_is_disconnected() to decide when to skip ATS invalidation, especially under GDR high-load conditions.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 6, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 2th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.10.214 and later · before 5.10.252
  • linux linux kernel5.15.153 and later · before 5.15.202
  • linux linux kernel6.1.83 and later · before 6.1.165
  • linux linux kernel6.6.23 and later · before 6.6.128
  • linux linux kernel6.7.11 and later · before 6.8
  • linux linux kernel6.8.2 and later · before 6.12.75
  • linux linux kernel6.13 and later · before 6.18.16
  • linux linux kernel6.19 and later · before 6.19.6

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • c04f2780919f20e2cc4846764221f5e802555868, 025bc6b41e020aeb1e71f84ae3ffce945026de05, 6.9affected
    • f873b85ec762c5a6abe94a7ddb31df5d3ba07d85 and later · before 581ce094d9eafb78ec4f9de77bd24b780c151236affected · git
    • d70f1c85113cd8c2aa8373f491ca5d1b22ec0554 and later · before e2c78c69f8faf2885ea4ceee08c71ac738f401a0affected · git
    • 34a7b30f56d30114bf4d436e4dc793afe326fbcf and later · before ead67d0378e90f419e385a43af29435242d80c12affected · git
    • 2b74b2a92e524d7c8dec8e02e95ecf18b667c062 and later · before 01aed2f1d7cb8fdf4c60c5bb4727608cb82b401daffected · git
    • 4fc82cd907ac075648789cc3a00877778aa1838b and later · before 9813306610d0d718c863aaa70928bf57d7570ec0affected · git
    • 4fc82cd907ac075648789cc3a00877778aa1838b and later · before 9deaacc8dcaddb6ddc5b52e1e63b457450ec0f94affected · git
    • 4fc82cd907ac075648789cc3a00877778aa1838b and later · before 0da6697e577023d8867c7beb2d16a22510e4eea9affected · git
    • 4fc82cd907ac075648789cc3a00877778aa1838b and later · before 10e60d87813989e20eac1f3eda30b3bae461e7f9affected · git
    • 5.10.214 and later · before 5.10.252affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.6-16.19.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-43128May 6, 2026 · RDMA/umem: Fix double dma_buf_unpin in failure path
    31Monitor
  • ← EarlierCVE-2026-43129May 6, 2026 · ima: verify the previous kernel's IMA buffer lies in addressable RAM
    22Monitor
  • Later →CVE-2026-43131May 6, 2026 · drm/amd/pm: Fix null pointer dereference issue
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux01aed2f1d7cb8fdf4c60c5bb4727608cb82b401dVendor (CNA)
Linux Linux0da6697e577023d8867c7beb2d16a22510e4eea9Vendor (CNA)
Linux Linux10e60d87813989e20eac1f3eda30b3bae461e7f9Vendor (CNA)
Linux Linux5.10.252Vendor (CNA)
Linux Linux5.15.202Vendor (CNA)
Linux Linux581ce094d9eafb78ec4f9de77bd24b780c151236Vendor (CNA)
Linux Linux6.1.165Vendor (CNA)
Linux Linux6.6.128Vendor (CNA)
Linux Linux6.8Vendor (CNA)
Linux Linux6.9Vendor (CNA)
Linux Linux9813306610d0d718c863aaa70928bf57d7570ec0Vendor (CNA)
Linux Linux9deaacc8dcaddb6ddc5b52e1e63b457450ec0f94Vendor (CNA)
Linux Linuxe2c78c69f8faf2885ea4ceee08c71ac738f401a0Vendor (CNA)
Linux Linuxead67d0378e90f419e385a43af29435242d80c12Vendor (CNA)
debian:linux6.1.170-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records