{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-49090",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-02-26T01:49:39.249Z",
        "datePublished": "2025-02-26T01:54:46.227Z",
        "dateUpdated": "2026-05-11T18:52:54.316Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T18:52:54.316Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narch/arm64: Fix topology initialization for core scheduling\n\nArm64 systems rely on store_cpu_topology() to call update_siblings_masks()\nto transfer the toplogy to the various cpu masks. This needs to be done\nbefore the call to notify_cpu_starting() which tells the scheduler about\neach cpu found, otherwise the core scheduling data structures are setup\nin a way that does not match the actual topology.\n\nWith smt_mask not setup correctly we bail on `cpumask_weight(smt_mask) == 1`\nfor !leaders in:\n\n notify_cpu_starting()\n   cpuhp_invoke_callback_range()\n     sched_cpu_starting()\n       sched_core_cpu_starting()\n\nwhich leads to rq->core not being correctly set for !leader-rq's.\n\nWithout this change stress-ng (which enables core scheduling in its prctl\ntests in newer versions -- i.e. with PR_SCHED_CORE support) causes a warning\nand then a crash (trimmed for legibility):\n\n[ 1853.805168] ------------[ cut here ]------------\n[ 1853.809784] task_rq(b)->core != rq->core\n[ 1853.809792] WARNING: CPU: 117 PID: 0 at kernel/sched/fair.c:11102 cfs_prio_less+0x1b4/0x1c4\n...\n[ 1854.015210] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n...\n[ 1854.231256] Call trace:\n[ 1854.233689]  pick_next_task+0x3dc/0x81c\n[ 1854.237512]  __schedule+0x10c/0x4cc\n[ 1854.240988]  schedule_idle+0x34/0x54"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/arm64/kernel/smp.c"
                    ],
                    "versions": [
                        {
                            "version": "9edeaea1bc452372718837ed2ba775811baf1ba1",
                            "lessThan": "87f5d66daa5f457449bb95d6b8d18bb7596aa627",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9edeaea1bc452372718837ed2ba775811baf1ba1",
                            "lessThan": "790c1567582bda8f1153015436e3330a7c6eb278",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9edeaea1bc452372718837ed2ba775811baf1ba1",
                            "lessThan": "c78a1b2d0bff678570c8dc9f14035606f5e5257d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9edeaea1bc452372718837ed2ba775811baf1ba1",
                            "lessThan": "5524cbb1bfcdff0cad0aaa9f94e6092002a07259",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/arm64/kernel/smp.c"
                    ],
                    "versions": [
                        {
                            "version": "5.14",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.14",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.34",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.16.20",
                            "lessThanOrEqual": "5.16.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.17.3",
                            "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": [
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionEndExcluding": "5.15.34"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionEndExcluding": "5.18"
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/87f5d66daa5f457449bb95d6b8d18bb7596aa627"
                },
                {
                    "url": "https://git.kernel.org/stable/c/790c1567582bda8f1153015436e3330a7c6eb278"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c78a1b2d0bff678570c8dc9f14035606f5e5257d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5524cbb1bfcdff0cad0aaa9f94e6092002a07259"
                }
            ],
            "title": "arch/arm64: Fix topology initialization for core scheduling",
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}