Unknown severity · Source severity not reportedCVE-2026-98997

drm/amdgpu/userq: only accept doorbell BOs as queue doorbellCVE-2026-98997

Answer in brief

CVE-2026-98997 records a Unknown severity vulnerability in drm/amdgpu/userq: only accept doorbell BOs as queue doorbell. 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 Oct 23, 2026Updated Oct 23, 2026Source checked Oct 25, 2026First seen by HOL Oct 23, 2026Material review Oct 23, 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	>=f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 <112dbe2b10d6d088a6c599980dd960dcbfa55ff0 \|\| >=f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 <8640b3f961d743d6dc0458c2b53a3af434690cc1 \|\| >=f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 <7f7c88dbf4d543f6703e53bdeed380e886733167	112dbe2b10d6d088a6c599980dd960dcbfa55ff0, 8640b3f961d743d6dc0458c2b53a3af434690cc1, 7f7c88dbf4d543f6703e53bdeed380e886733167
Linux/Linuxgeneric	6.16	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 112dbe2b10d6d088a6c599980dd960dcbfa55ff0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 23, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/userq: only accept doorbell BOs as queue doorbell amdgpu_userq_get_doorbell_index() pins any BO passed as doorbell_handle into the doorbell domain. For a regular BO, TTM moves it with ttm_bo_move_null() and its contents are lost. Since an importer on the same device gets the exporter's GEM object, a client can do this to a buffer another client shared with it. Reject BOs that were not created in the doorbell domain. v2: drop the error message, use a local abo variable (Christian) (cherry picked from commit f7497bbc19db4821c62b9d97b31c9086feb2d917)

Quoted source text, attributed separately from HOL analysis.