iommu/amd: Put PCI device after handling PPR faults (CVE-2026-89453) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89453

iommu/amd: Put PCI device after handling PPR faults

Answer in brief

CVE-2026-89453 records a Unknown severity vulnerability in iommu/amd: Put PCI device after handling PPR faults. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=978d626b8f1a239acc635323d731c77eae54eb61 <1de4443f85e4405af00153cdf8ba73ff12a65036 \|\| >=978d626b8f1a239acc635323d731c77eae54eb61 <cfc5c1b2caa176dfd40b873a6ff07b11da34cc3e \|\| >=978d626b8f1a239acc635323d731c77eae54eb61 <d1470e16c1977e6c94fadf6048deafaa4d150fec \|\| >=978d626b8f1a239acc635323d731c77eae54eb61 <af3b69b16383fbc8fe5f61b5b0150d2e41ede71f	1de4443f85e4405af00153cdf8ba73ff12a65036, cfc5c1b2caa176dfd40b873a6ff07b11da34cc3e, d1470e16c1977e6c94fadf6048deafaa4d150fec, af3b69b16383fbc8fe5f61b5b0150d2e41ede71f
Linux/Linuxgeneric	6.10	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 1de4443f85e4405af00153cdf8ba73ff12a65036 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Put PCI device after handling PPR faults iommu_call_iopf_notifier() looks up the requester with pci_get_domain_bus_and_slot(), which returns a PCI device with its reference count incremented. Neither the successful iommu_report_device_fault() path nor the abort path drops that reference, so every handled PPR request leaks a PCI device reference. This is the same ownership rule that was fixed for the old iommu_v2 ppr_notifier() path by commit 6cf0981c2233 ("iommu/amd: Fix pci device refcount leak in ppr_notifier()"), but iommu_call_iopf_notifier() was added later as a separate PPR/IOPF notifier path. Drop the PCI device reference after handling the PPR entry.

Quoted source text, attributed separately from HOL analysis.