x86/amd_node: Fix PCI device reference counting in amd_smn_init() (CVE-2026-97946) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-97946

x86/amd_node: Fix PCI device reference counting in amd_smn_init()

Answer in brief

CVE-2026-97946 records a Unknown severity vulnerability in x86/amd_node: Fix PCI device reference counting in amd_smn_init(). 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 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 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	>=0a4b61d9c2e496b5f0a10e29e355a1465c8738bb <84e3a71d11d8593c127b468d75b2653af5074f81 \|\| >=0a4b61d9c2e496b5f0a10e29e355a1465c8738bb <aa2a4277ad42fd8f918c6dc652473946a253f7b0 \|\| >=0a4b61d9c2e496b5f0a10e29e355a1465c8738bb <27600805e62f800bacf990354632eae4e487d34c \|\| c4ad899a33198ab6335732c769835d035e66894a \|\| >=6.17.8 <6.18	84e3a71d11d8593c127b468d75b2653af5074f81, aa2a4277ad42fd8f918c6dc652473946a253f7b0, 27600805e62f800bacf990354632eae4e487d34c, 6.18
Linux/Linuxgeneric	6.18	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 84e3a71d11d8593c127b468d75b2653af5074f81 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: x86/amd_node: Fix PCI device reference counting in amd_smn_init() The local "root" pointer is a temporary variable used during the device search. Therefore, refcount related to the search iterators should be cleaned up after the search is complete. Use the __free() cleanup macro to ensure the refcount is decremented when the temporary pointer goes out of scope. Additionally, increment the refcount when caching a root pointer. This ensures the in-use refcount is separate from the temporary search refcounting. Finally, drop the redundant "root = NULL" before the second search loop. The pci_get_class() iterator always decrements the refcount of its "from" argument, so the first loop can only fall through with "root" already NULL.

Quoted source text, attributed separately from HOL analysis.