CVE-2026-98309drm/vc4: Use managed KMS polling to fix UAF on unbind
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from c8b75bca92cbf064b9fa125fc74a85994452e935 before b6beee927e7f4e3142032ff91b2d0417cdddc0f6; from c8b75bca92cbf064b9fa125fc74a85994452e935 before cf0c4432bda37b02e7d430ff5017228ceb7caf0c; from c8b75bca92cbf064b9fa125fc74a85994452e935 before ee507691c18f9fee5d4751e295ab9a7ff31d59ae; from c8b75bca92cbf064b9fa125fc74a85994452e935 before 7f9780df677370a19b4ec9764f13b1b82073e0d9; from c8b75bca92cbf064b9fa125fc74a85994452e935 before 073a30d75f309812ed61af134f24ffef4107b13a | CNA record |
References
- https://git.kernel.org/stable/c/b6beee927e7f4e3142032ff91b2d0417cdddc0f6
- https://git.kernel.org/stable/c/cf0c4432bda37b02e7d430ff5017228ceb7caf0c
- https://git.kernel.org/stable/c/ee507691c18f9fee5d4751e295ab9a7ff31d59ae
- https://git.kernel.org/stable/c/7f9780df677370a19b4ec9764f13b1b82073e0d9
- https://git.kernel.org/stable/c/073a30d75f309812ed61af134f24ffef4107b13a
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.