CVE-2026-93084

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93084", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T15:57:05.662Z", "datePublished": "2026-09-17T16:11:03.659Z", "dateUpdated": "2026-10-30T12:35:50.721Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:35:50.721Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Drop handle on protocol bind failures\n\nThe SCMI bus notifier acquires an SCMI handle when the driver core emits\nBUS_NOTIFY_BIND_DRIVER, before invoking the protocol driver probe\ncallback. The protocol probe path only checks whether sdev->handle is\nset.\n\nIf device_link_add() fails after the handle has been acquired, the\nprotocol device can still bind with a valid handle but without the\ndependency link to the SCMI parent. A concurrent parent unbind can then\nmiss the child and tear down the SCMI instance while the child still\nholds a handle into it.\n\nIf the protocol driver probe later fails, for example with\n-EPROBE_DEFER, the driver core emits BUS_NOTIFY_DRIVER_NOT_BOUND rather\nthan BUS_NOTIFY_UNBOUND_DRIVER. The SCMI notifier only released the\nhandle on BUS_NOTIFY_UNBOUND_DRIVER, so each failed protocol-device bind\nleaked the SCMI instance users refcount and left sdev->handle set after\nthe failed probe.\n\nMake the link helper report failure and drop the acquired handle if the\nlink cannot be created. Also handle BUS_NOTIFY_DRIVER_NOT_BOUND in the\nsame cleanup path used for unbind so failed probes balance the earlier\nBUS_NOTIFY_BIND_DRIVER acquisition."}], "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"], "versions": [{"version": "b50c9270304cfed6ee1c4ce5036102ad7b762051", "lessThan": "b5377e690cd4fe87ee52fcf067c9929414ea8f4e", "status": "affected", "versionType": "git"}, {"version": "971fc0665f1361f23251e4d85fac4aed1b683505", "lessThan": "0f860db24ee95e5da4866303a35e55098b9641b3", "status": "affected", "versionType": "git"}, {"version": "971fc0665f1361f23251e4d85fac4aed1b683505", "lessThan": "df273eced7cec550465fd1bb82a5d2c3c7d3c437", "status": "affected", "versionType": "git"}, {"version": "971fc0665f1361f23251e4d85fac4aed1b683505", "lessThan": "a54dc23e8bd2246c28eafffa60b4634f0d1a11cc", "status": "affected", "versionType": "git"}, {"version": "971fc0665f1361f23251e4d85fac4aed1b683505", "lessThan": "77d2985d1e80e67f32026fc03e975c4c83cc543d", "status": "affected", "versionType": "git"}, {"version": "971fc0665f1361f23251e4d85fac4aed1b683505", "lessThan": "e3a5c30d233ca5d3e799a80da806554c703bda13", "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"], "versions": [{"version": "6.3", "status": "affected"}, {"version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "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": "6.3", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b5377e690cd4fe87ee52fcf067c9929414ea8f4e"}, {"url": "https://git.kernel.org/stable/c/0f860db24ee95e5da4866303a35e55098b9641b3"}, {"url": "https://git.kernel.org/stable/c/df273eced7cec550465fd1bb82a5d2c3c7d3c437"}, {"url": "https://git.kernel.org/stable/c/a54dc23e8bd2246c28eafffa60b4634f0d1a11cc"}, {"url": "https://git.kernel.org/stable/c/77d2985d1e80e67f32026fc03e975c4c83cc543d"}, {"url": "https://git.kernel.org/stable/c/e3a5c30d233ca5d3e799a80da806554c703bda13"}], "title": "firmware: arm_scmi: Drop handle on protocol bind failures", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/firmware/arm_scmi/driver.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b5377e690cd4fe87ee52fcf067c9929414ea8f4e", "status": "affected", "version": "b50c9270304cfed6ee1c4ce5036102ad7b762051", "versionType": "git"}, {"lessThan": "0f860db24ee95e5da4866303a35e55098b9641b3", "status": "affected", "version": "971fc0665f1361f23251e4d85fac4aed1b683505", "versionType": "git"}, {"lessThan": "df273eced7cec550465fd1bb82a5d2c3c7d3c437", "status": "affected", "version": "971fc0665f1361f23251e4d85fac4aed1b683505", "versionType": "git"}, {"lessThan": "a54dc23e8bd2246c28eafffa60b4634f0d1a11cc", "status": "affected", "version": "971fc0665f1361f23251e4d85fac4aed1b683505", "versionType": "git"}, {"lessThan": "77d2985d1e80e67f32026fc03e975c4c83cc543d", "status": "affected", "version": "971fc0665f1361f23251e4d85fac4aed1b683505", "versionType": "git"}, {"lessThan": "e3a5c30d233ca5d3e799a80da806554c703bda13", "status": "affected", "version": "971fc0665f1361f23251e4d85fac4aed1b683505", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/firmware/arm_scmi/driver.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.3"}, {"lessThan": "6.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "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: Drop handle on protocol bind failures\n\nThe SCMI bus notifier acquires an SCMI handle when the driver core emits\nBUS_NOTIFY_BIND_DRIVER, before invoking the protocol driver probe\ncallback. The protocol probe path only checks whether sdev->handle is\nset.\n\nIf device_link_add() fails after the handle has been acquired, the\nprotocol device can still bind with a valid handle but without the\ndependency link to the SCMI parent. A concurrent parent unbind can then\nmiss the child and tear down the SCMI instance while the child still\nholds a handle into it.\n\nIf the protocol driver probe later fails, for example with\n-EPROBE_DEFER, the driver core emits BUS_NOTIFY_DRIVER_NOT_BOUND rather\nthan BUS_NOTIFY_UNBOUND_DRIVER. The SCMI notifier only released the\nhandle on BUS_NOTIFY_UNBOUND_DRIVER, so each failed protocol-device bind\nleaked the SCMI instance users refcount and left sdev->handle set after\nthe failed probe.\n\nMake the link helper report failure and drop the acquired handle if the\nlink cannot be created. Also handle BUS_NOTIFY_DRIVER_NOT_BOUND in the\nsame cleanup path used for unbind so failed probes balance the earlier\nBUS_NOTIFY_BIND_DRIVER acquisition."}], "id": "CVE-2026-93084", "lastModified": "2026-10-30T13:20:56.447", "metrics": {}, "published": "2026-09-17T17:18:02.460", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0f860db24ee95e5da4866303a35e55098b9641b3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/77d2985d1e80e67f32026fc03e975c4c83cc543d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a54dc23e8bd2246c28eafffa60b4634f0d1a11cc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b5377e690cd4fe87ee52fcf067c9929414ea8f4e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/df273eced7cec550465fd1bb82a5d2c3c7d3c437"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e3a5c30d233ca5d3e799a80da806554c703bda13"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[971fc0665f1361f23251e4d85fac4aed1b683505,0f860db24ee95e5da4866303a35e55098b9641b3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[971fc0665f1361f23251e4d85fac4aed1b683505,77d2985d1e80e67f32026fc03e975c4c83cc543d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[971fc0665f1361f23251e4d85fac4aed1b683505,a54dc23e8bd2246c28eafffa60b4634f0d1a11cc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[971fc0665f1361f23251e4d85fac4aed1b683505,df273eced7cec550465fd1bb82a5d2c3c7d3c437)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[971fc0665f1361f23251e4d85fac4aed1b683505,e3a5c30d233ca5d3e799a80da806554c703bda13)"}}], "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": "generic", "value": "6.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,7.0.0)"}}, {"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": "2026-09-19T06:45:17.071064+00:00", "updated": "2026-09-19T17:00:11.495426+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-401", "CWE-416"]}