{"id":"CVE-2026-98309","revision":"30590752729b401c9d545d005a2cf55f","records":[{"revision":"30590752729b401c9d545d005a2cf55f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98309","aliases":[],"title":"drm/vc4: Use managed KMS polling to fix UAF on unbind","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: Use managed KMS polling to fix UAF on unbind\n\nvc4_kms_load() calls drm_kms_helper_poll_init() but the driver provides\nno matching drm_kms_helper_poll_fini(). The output poll work stays\nscheduled after unbind and runs on the freed drm_device:\n\n  # modprobe vc4; rmmod vc4; sleep 10\n  BUG: KASAN: slab-use-after-free in delayed_work_timer_fn\n  BUG: KASAN: slab-use-after-free in drm_client_dev_hotplug [drm]\n  Workqueue: events output_poll_execute [drm_kms_helper]\n  Allocated by task 171: __devm_drm_dev_alloc\n  Freed by task 262 (rmmod): drm_dev_put / component_del\n\nUse drmm_kms_helper_poll_init() so polling is finalized with the device,\nas other drivers do.","state":0,"publishedAt":"2026-10-06T08:46:05.957+00:00","modifiedAt":"2026-10-19T09:17:19.914+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/vc4/vc4_kms.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"c8b75bca92cbf064b9fa125fc74a85994452e935\",\n                            \"lessThan\": \"b6beee927e7f4e3142032ff91b2d0417cdddc0f6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c8b75bca92cbf064b9fa125fc74a85994452e935\",\n                            \"lessThan\": \"cf0c4432bda37b02e7d430ff5017228ceb7caf0c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c8b75bca92cbf064b9fa125fc74a85994452e935\",\n                            \"lessThan\": \"ee507691c18f9fee5d4751e295ab9a7ff31d59ae\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c8b75bca92cbf064b9fa125fc74a85994452e935\",\n                            \"lessThan\": \"7f9780df677370a19b4ec9764f13b1b82073e0d9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c8b75bca92cbf064b9fa125fc74a85994452e935\",\n                            \"lessThan\": \"073a30d75f309812ed61af134f24ffef4107b13a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/vc4/vc4_kms.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.112\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.54\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.8\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"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"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98309","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98309","identifiers":["CVE-2026-98309"]},"retained":false,"historicalAffected":[]}],"coverage":[]}