Answer in brief
CVE-2026-98309 records a Unknown severity vulnerability in drm/vc4: Use managed KMS polling to fix UAF on unbind. 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.
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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=c8b75bca92cbf064b9fa125fc74a85994452e935 <b6beee927e7f4e3142032ff91b2d0417cdddc0f6 || >=c8b75bca92cbf064b9fa125fc74a85994452e935 <cf0c4432bda37b02e7d430ff5017228ceb7caf0c || >=c8b75bca92cbf064b9fa125fc74a85994452e935 <ee507691c18f9fee5d4751e295ab9a7ff31d59ae || >=c8b75bca92cbf064b9fa125fc74a85994452e935 <7f9780df677370a19b4ec9764f13b1b82073e0d9 || >=c8b75bca92cbf064b9fa125fc74a85994452e935 <073a30d75f309812ed61af134f24ffef4107b13a | b6beee927e7f4e3142032ff91b2d0417cdddc0f6, cf0c4432bda37b02e7d430ff5017228ceb7caf0c, ee507691c18f9fee5d4751e295ab9a7ff31d59ae, 7f9780df677370a19b4ec9764f13b1b82073e0d9, 073a30d75f309812ed61af134f24ffef4107b13a |
| Linux/Linuxgeneric | 4.4 | Not reported |
Published upstream
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 6, 2026
In the Linux kernel, the following vulnerability has been resolved: drm/vc4: Use managed KMS polling to fix UAF on unbind vc4_kms_load() calls drm_kms_helper_poll_init() but the driver provides no matching drm_kms_helper_poll_fini(). The output poll work stays scheduled after unbind and runs on the freed drm_device: # modprobe vc4; rmmod vc4; sleep 10 BUG: KASAN: slab-use-after-free in delayed_work_timer_fn BUG: KASAN: slab-use-after-free in drm_client_dev_hotplug [drm] Workqueue: events output_poll_execute [drm_kms_helper] Allocated by task 171: __devm_drm_dev_alloc Freed by task 262 (rmmod): drm_dev_put / component_del Use drmm_kms_helper_poll_init() so polling is finalized with the device, as other drivers do.
Quoted source text, attributed separately from HOL analysis.