{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-93097",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-17T16:02:15.084Z",
        "datePublished": "2026-09-17T16:11:11.025Z",
        "dateUpdated": "2026-10-19T09:05:30.426Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:05:30.426Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/mbox: Break poison list loop on an empty payload\n\nA device that returns count == 0 with CXL_POISON_FLAG_MORE set on every\niteration never advances nr_records, so the max_errors guard never\ntrips and the do/while loops forever while holding poison.mutex. That\nhangs the sysfs-triggered scan thread and blocks all subsequent poison\noperations on the device. The existing \"Protect against an uncleared\n_FLAG_MORE\" guard was intended to bound a misbehaving device but does\nnot cover the count == 0 case.\n\nStop the loop on an empty payload so a malfunctioning or malicious\ndevice cannot wedge the poison scan."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/cxl/core/mbox.c"
                    ],
                    "versions": [
                        {
                            "version": "ed83f7ca398b3798b82c1d5d1113011c0e5a2198",
                            "lessThan": "86771c105293ca26bfcc320b4f60d32c137b54aa",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ed83f7ca398b3798b82c1d5d1113011c0e5a2198",
                            "lessThan": "42eab80981f4d2ac820e253e80ecf92f8cd91f69",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ed83f7ca398b3798b82c1d5d1113011c0e5a2198",
                            "lessThan": "6ad491cef1a812cf7b53aa769cd8869516c47362",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ed83f7ca398b3798b82c1d5d1113011c0e5a2198",
                            "lessThan": "e77594e0cea67ab1c2317a27aa77a744e26ad6a6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ed83f7ca398b3798b82c1d5d1113011c0e5a2198",
                            "lessThan": "8b301c4afbce4bc3f94528441d8d5ce1366504ad",
                            "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/cxl/core/mbox.c"
                    ],
                    "versions": [
                        {
                            "version": "6.4",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.4",
                            "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": "6.4",
                                    "versionEndExcluding": "6.6.157"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "6.12.110"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "6.18.52"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "7.2.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/86771c105293ca26bfcc320b4f60d32c137b54aa"
                },
                {
                    "url": "https://git.kernel.org/stable/c/42eab80981f4d2ac820e253e80ecf92f8cd91f69"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6ad491cef1a812cf7b53aa769cd8869516c47362"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e77594e0cea67ab1c2317a27aa77a744e26ad6a6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8b301c4afbce4bc3f94528441d8d5ce1366504ad"
                }
            ],
            "title": "cxl/mbox: Break poison list loop on an empty payload",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}