{"id":"CVE-2026-93091","revision":"8eb8986a19574cedae3ca05ffb7ba63f","records":[{"revision":"8eb8986a19574cedae3ca05ffb7ba63f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93091","aliases":[],"title":"firmware: arm_scmi: Quiesce notifications before teardown","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Quiesce notifications before teardown\n\nscmi_notification_exit() clears and releases the notification instance,\nbut transport callbacks can still deliver incoming notifications until\nthe TX/RX channels are freed. During remove, an RX interrupt in that\nwindow can enter scmi_notify() while notification state is being torn\ndown and then dereference freed memory. The same ordering exists on the\nprobe error path after notification initialization.\n\nThe notification late-init worker has a separate lifetime issue: protocol\nevent registration queues ni->init_work on the system workqueue, so\ndestroying ni->notify_wq does not drain that work. If the devres group is\nreleased while init_work is still pending or running, the late-init worker\ncan dereference the freed notification instance.\n\nQuiesce the notification core before TX/RX channels are torn down, then\nclean up the channels before releasing the notification core resources.\nUse disable_work_sync() so future late-init queueing is rejected and any\nalready queued or running late-init work has completed before channel\nteardown starts.","state":0,"publishedAt":"2026-09-17T16:11:07.055+00:00","modifiedAt":"2026-10-19T09:05:24.667+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/firmware/arm_scmi/driver.c\",\n                        \"drivers/firmware/arm_scmi/notify.c\",\n                        \"drivers/firmware/arm_scmi/notify.h\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"1e7cbfaa66d39e78bd24df0c78b55df68176b59e\",\n                            \"lessThan\": \"6778bcabd2e0c32f73476f0bc6369013692540be\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1e7cbfaa66d39e78bd24df0c78b55df68176b59e\",\n                            \"lessThan\": \"2aac23bc0a79af41104d99823bb250fae92ba144\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1e7cbfaa66d39e78bd24df0c78b55df68176b59e\",\n                            \"lessThan\": \"5e30d3d16d1a9e599be4dcea872874e65e2c277b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1e7cbfaa66d39e78bd24df0c78b55df68176b59e\",\n                            \"lessThan\": \"8e49055d0d495c9c07575ad8e111d9eaf0efb13f\",\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/firmware/arm_scmi/driver.c\",\n                        \"drivers/firmware/arm_scmi/notify.c\",\n                        \"drivers/firmware/arm_scmi/notify.h\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.15\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.15\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\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/6778bcabd2e0c32f73476f0bc6369013692540be","https://git.kernel.org/stable/c/2aac23bc0a79af41104d99823bb250fae92ba144","https://git.kernel.org/stable/c/5e30d3d16d1a9e599be4dcea872874e65e2c277b","https://git.kernel.org/stable/c/8e49055d0d495c9c07575ad8e111d9eaf0efb13f"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93091","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93091","identifiers":["CVE-2026-93091"]},"retained":false,"historicalAffected":[]}],"coverage":[]}