{
    "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"
            }
        }
    }
}