CVE-2026-93091

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93091", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T16:02:15.084Z", "datePublished": "2026-09-17T16:11:07.055Z", "dateUpdated": "2026-10-19T09:05:24.667Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:05:24.667Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/firmware/arm_scmi/driver.c", "drivers/firmware/arm_scmi/notify.c", "drivers/firmware/arm_scmi/notify.h"], "versions": [{"version": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e", "lessThan": "6778bcabd2e0c32f73476f0bc6369013692540be", "status": "affected", "versionType": "git"}, {"version": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e", "lessThan": "2aac23bc0a79af41104d99823bb250fae92ba144", "status": "affected", "versionType": "git"}, {"version": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e", "lessThan": "5e30d3d16d1a9e599be4dcea872874e65e2c277b", "status": "affected", "versionType": "git"}, {"version": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e", "lessThan": "8e49055d0d495c9c07575ad8e111d9eaf0efb13f", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/firmware/arm_scmi/driver.c", "drivers/firmware/arm_scmi/notify.c", "drivers/firmware/arm_scmi/notify.h"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6778bcabd2e0c32f73476f0bc6369013692540be"}, {"url": "https://git.kernel.org/stable/c/2aac23bc0a79af41104d99823bb250fae92ba144"}, {"url": "https://git.kernel.org/stable/c/5e30d3d16d1a9e599be4dcea872874e65e2c277b"}, {"url": "https://git.kernel.org/stable/c/8e49055d0d495c9c07575ad8e111d9eaf0efb13f"}], "title": "firmware: arm_scmi: Quiesce notifications before teardown", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/firmware/arm_scmi/driver.c", "drivers/firmware/arm_scmi/notify.c", "drivers/firmware/arm_scmi/notify.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6778bcabd2e0c32f73476f0bc6369013692540be", "status": "affected", "version": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e", "versionType": "git"}, {"lessThan": "2aac23bc0a79af41104d99823bb250fae92ba144", "status": "affected", "version": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e", "versionType": "git"}, {"lessThan": "5e30d3d16d1a9e599be4dcea872874e65e2c277b", "status": "affected", "version": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e", "versionType": "git"}, {"lessThan": "8e49055d0d495c9c07575ad8e111d9eaf0efb13f", "status": "affected", "version": "1e7cbfaa66d39e78bd24df0c78b55df68176b59e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/firmware/arm_scmi/driver.c", "drivers/firmware/arm_scmi/notify.c", "drivers/firmware/arm_scmi/notify.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.15"}, {"lessThan": "5.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-93091", "lastModified": "2026-10-19T10:16:58.883", "metrics": {}, "published": "2026-09-17T17:18:03.063", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2aac23bc0a79af41104d99823bb250fae92ba144"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5e30d3d16d1a9e599be4dcea872874e65e2c277b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6778bcabd2e0c32f73476f0bc6369013692540be"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8e49055d0d495c9c07575ad8e111d9eaf0efb13f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1e7cbfaa66d39e78bd24df0c78b55df68176b59e,6778bcabd2e0c32f73476f0bc6369013692540be)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1e7cbfaa66d39e78bd24df0c78b55df68176b59e,2aac23bc0a79af41104d99823bb250fae92ba144)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1e7cbfaa66d39e78bd24df0c78b55df68176b59e,5e30d3d16d1a9e599be4dcea872874e65e2c277b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1e7cbfaa66d39e78bd24df0c78b55df68176b59e,8e49055d0d495c9c07575ad8e111d9eaf0efb13f)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "5.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-19T09:15:14.413843+00:00", "updated": "2026-09-19T16:30:17.472817+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}