{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-49054",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-02-26T01:49:39.243Z",
        "datePublished": "2025-02-26T01:54:27.286Z",
        "dateUpdated": "2026-08-05T08:53:39.023Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T08:53:39.023Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nDrivers: hv: vmbus: Deactivate sysctl_record_panic_msg by default in isolated guests\n\nhv_panic_page might contain guest-sensitive information, do not dump it\nover to Hyper-V by default in isolated guests.\n\nWhile at it, update some comments in hyperv_{panic,die}_event()."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
                        "baseScore": 7.1,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The leak occurs over the Hyper-V guest crash MSR / panic-page interface between an isolated guest and its host, which is a local hypervisor channel rather than a network or physical attack path.\nAC:L - Whenever a panic occurs with the default-enabled sysctl, hv_kmsg_dump() reliably copies kmsg into hv_panic_page and notifies Hyper-V; no race, special memory layout, or other condition beyond the attacker’s influence is required for the disclosure itself.\nPR:N - The adversarial party is the Hyper-V host outside the isolated guest’s TCB and needs no privileges inside the guest; the guest kernel voluntarily exports the panic page on crash without authentication.\nUI:N - No victim user action is required; the dump runs automatically from the panic/kmsg_dump notifier path when the guest crashes.\nS:C - Isolated guests (SNP/VBS) treat the hypervisor as a separate security authority; disclosing guest kmsg to Hyper-V crosses that confidential-computing boundary, analogous to other guest-to-untrusted-VMM leaks scored with Scope Changed.\nC:H - Up to a full Hyper-V page of kernel log is shared with the host and may contain secrets, credentials, key material, and other sensitive guest data that confidential VMs are meant to withhold from the hypervisor.\nI:N - The bug only discloses existing kmsg contents to the host; it does not modify guest or host integrity or provide a write primitive.\nA:N - The vulnerability does not cause crashes or denial of service; it only improperly exports information when a panic has already occurred for other reasons."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/hv/vmbus_drv.c"
                    ],
                    "versions": [
                        {
                            "version": "a6c76bb08dc7f7ff2b1c381002eb6c7211746182",
                            "lessThan": "1b576e81d31b56b248316b8ff816b1cc5c4407c7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a6c76bb08dc7f7ff2b1c381002eb6c7211746182",
                            "lessThan": "6230bc50d6d21cae4c084766623d0a6d17958721",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a6c76bb08dc7f7ff2b1c381002eb6c7211746182",
                            "lessThan": "9f8b577f7b43b2170628d6c537252785dcc2dcea",
                            "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/hv/vmbus_drv.c"
                    ],
                    "versions": [
                        {
                            "version": "5.12",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.12",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.35",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.17.4",
                            "lessThanOrEqual": "5.17.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.18",
                            "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": "5.12",
                                    "versionEndExcluding": "5.15.35"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "5.17.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.12",
                                    "versionEndExcluding": "5.18"
                                }
                            ]
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                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/1b576e81d31b56b248316b8ff816b1cc5c4407c7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6230bc50d6d21cae4c084766623d0a6d17958721"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9f8b577f7b43b2170628d6c537252785dcc2dcea"
                }
            ],
            "title": "Drivers: hv: vmbus: Deactivate sysctl_record_panic_msg by default in isolated guests",
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                "engine": "bippy-1.2.0"
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