{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-49726",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-02-26T02:21:30.448Z",
        "datePublished": "2025-02-26T02:24:38.003Z",
        "dateUpdated": "2026-05-11T19:05:39.715Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:05:39.715Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nclocksource: hyper-v: unexport __init-annotated hv_init_clocksource()\n\nEXPORT_SYMBOL and __init is a bad combination because the .init.text\nsection is freed up after the initialization. Hence, modules cannot\nuse symbols annotated __init. The access to a freed symbol may end up\nwith kernel panic.\n\nmodpost used to detect it, but it has been broken for a decade.\n\nRecently, I fixed modpost so it started to warn it again, then this\nshowed up in linux-next builds.\n\nThere are two ways to fix it:\n\n  - Remove __init\n  - Remove EXPORT_SYMBOL\n\nI chose the latter for this case because the only in-tree call-site,\narch/x86/kernel/cpu/mshyperv.c is never compiled as modular.\n(CONFIG_HYPERVISOR_GUEST is boolean)"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/clocksource/hyperv_timer.c"
                    ],
                    "versions": [
                        {
                            "version": "dd2cb348613b44f9d948b068775e159aad298599",
                            "lessThan": "cff3a7ce6e81418b6e8bac941779bbf5d342d626",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "dd2cb348613b44f9d948b068775e159aad298599",
                            "lessThan": "db965e2757d95f695e606856418cd84003dd036d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "dd2cb348613b44f9d948b068775e159aad298599",
                            "lessThan": "0414eab7c78f3518143d383e448d44fc573ac6d2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "dd2cb348613b44f9d948b068775e159aad298599",
                            "lessThan": "937fcbb55a1e48a6422e87e8f49422c92265f102",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "dd2cb348613b44f9d948b068775e159aad298599",
                            "lessThan": "245b993d8f6c4e25f19191edfbd8080b645e12b1",
                            "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/clocksource/hyperv_timer.c"
                    ],
                    "versions": [
                        {
                            "version": "5.3",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.3",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.200",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.124",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.49",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.18.6",
                            "lessThanOrEqual": "5.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.19",
                            "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": "5.3",
                                    "versionEndExcluding": "5.4.200"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.3",
                                    "versionEndExcluding": "5.10.124"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.3",
                                    "versionEndExcluding": "5.15.49"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.3",
                                    "versionEndExcluding": "5.18.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.3",
                                    "versionEndExcluding": "5.19"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/cff3a7ce6e81418b6e8bac941779bbf5d342d626"
                },
                {
                    "url": "https://git.kernel.org/stable/c/db965e2757d95f695e606856418cd84003dd036d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0414eab7c78f3518143d383e448d44fc573ac6d2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/937fcbb55a1e48a6422e87e8f49422c92265f102"
                },
                {
                    "url": "https://git.kernel.org/stable/c/245b993d8f6c4e25f19191edfbd8080b645e12b1"
                }
            ],
            "title": "clocksource: hyper-v: unexport __init-annotated hv_init_clocksource()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}