{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-40163",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T07:20:57.176Z",
        "datePublished": "2025-11-12T10:26:23.199Z",
        "dateUpdated": "2026-06-01T16:05:34.972Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-01T16:05:34.972Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched/deadline: Stop dl_server before CPU goes offline\n\nIBM CI tool reported kernel warning[1] when running a CPU removal\noperation through drmgr[2]. i.e \"drmgr -c cpu -r -q 1\"\n\nWARNING: CPU: 0 PID: 0 at kernel/sched/cpudeadline.c:219 cpudl_set+0x58/0x170\nNIP [c0000000002b6ed8] cpudl_set+0x58/0x170\nLR [c0000000002b7cb8] dl_server_timer+0x168/0x2a0\nCall Trace:\n[c000000002c2f8c0] init_stack+0x78c0/0x8000 (unreliable)\n[c0000000002b7cb8] dl_server_timer+0x168/0x2a0\n[c00000000034df84] __hrtimer_run_queues+0x1a4/0x390\n[c00000000034f624] hrtimer_interrupt+0x124/0x300\n[c00000000002a230] timer_interrupt+0x140/0x320\n\nGit bisects to: commit 4ae8d9aa9f9d (\"sched/deadline: Fix dl_server getting stuck\")\n\nThis happens since:\n- dl_server hrtimer gets enqueued close to cpu offline, when\n  kthread_park enqueues a fair task.\n- CPU goes offline and drmgr removes it from cpu_present_mask.\n- hrtimer fires and warning is hit.\n\nFix it by stopping the dl_server before CPU is marked dead.\n\n[1]: https://lore.kernel.org/all/8218e149-7718-4432-9312-f97297c352b9@linux.ibm.com/\n[2]: https://github.com/ibm-power-utilities/powerpc-utils/tree/next/src/drmgr\n\n[sshegde: wrote the changelog and tested it]"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/sched/core.c",
                        "kernel/sched/deadline.c"
                    ],
                    "versions": [
                        {
                            "version": "030167dcadf50a9f9dac4de6fa4c34f4f7afeed7",
                            "lessThan": "d7fd56ed5e07e053a5eea6112d61fcaded653b87",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4ae8d9aa9f9dc7137ea5e564d79c5aa5af1bc45c",
                            "lessThan": "ab6c0f158508bb16d483add70b73a73f95651c33",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4ae8d9aa9f9dc7137ea5e564d79c5aa5af1bc45c",
                            "lessThan": "ee6e44dfe6e50b4a5df853d933a96bdff5309e6e",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/sched/core.c",
                        "kernel/sched/deadline.c"
                    ],
                    "versions": [
                        {
                            "version": "6.17",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.17",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17.5",
                            "lessThanOrEqual": "6.17.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18",
                            "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": "6.17",
                                    "versionEndExcluding": "6.17.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.17",
                                    "versionEndExcluding": "6.18"
                                }
                            ]
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/d7fd56ed5e07e053a5eea6112d61fcaded653b87"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ab6c0f158508bb16d483add70b73a73f95651c33"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ee6e44dfe6e50b4a5df853d933a96bdff5309e6e"
                }
            ],
            "title": "sched/deadline: Stop dl_server before CPU goes offline",
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}