CVE-2026-98309 (GCVE-0-2026-98309)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:46 – Updated: 2026-10-06 08:46
VLAI
Title
drm/vc4: Use managed KMS polling to fix UAF on unbind
Summary
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 54/100 over 6633 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c8b75bca92cbf064b9fa125fc74a85994452e935 , < b6beee927e7f4e3142032ff91b2d0417cdddc0f6 (git)
Affected: c8b75bca92cbf064b9fa125fc74a85994452e935 , < cf0c4432bda37b02e7d430ff5017228ceb7caf0c (git)
Affected: c8b75bca92cbf064b9fa125fc74a85994452e935 , < ee507691c18f9fee5d4751e295ab9a7ff31d59ae (git)
Affected: c8b75bca92cbf064b9fa125fc74a85994452e935 , < 7f9780df677370a19b4ec9764f13b1b82073e0d9 (git)
Affected: c8b75bca92cbf064b9fa125fc74a85994452e935 , < 073a30d75f309812ed61af134f24ffef4107b13a (git)
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Linux Linux Affected: 4.4
Unaffected: 0 , < 4.4 (semver)
Unaffected: 6.6.158 , ≤ 6.6.* (semver)
Unaffected: 6.12.112 , ≤ 6.12.* (semver)
Unaffected: 6.18.54 , ≤ 6.18.* (semver)
Unaffected: 7.2.8 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)
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      "id": "CVE-2026-98309",
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}



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