{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-71102",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:30:19.651Z",
        "datePublished": "2026-01-14T15:05:52.389Z",
        "dateUpdated": "2026-05-11T21:54:47.227Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:54:47.227Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscs: fix a wrong parameter in __scs_magic\n\n__scs_magic() needs a 'void *' variable, but a 'struct task_struct *' is\ngiven.  'task_scs(tsk)' is the starting address of the task's shadow call\nstack, and '__scs_magic(task_scs(tsk))' is the end address of the task's\nshadow call stack.  Here should be '__scs_magic(task_scs(tsk))'.\n\nThe user-visible effect of this bug is that when CONFIG_DEBUG_STACK_USAGE\nis enabled, the shadow call stack usage checking function\n(scs_check_usage) would scan an incorrect memory range.  This could lead\n\n1. **Inaccurate stack usage reporting**: The function would calculate\n   wrong usage statistics for the shadow call stack, potentially showing\n   incorrect value in kmsg.\n\n2. **Potential kernel crash**: If the value of __scs_magic(tsk)is\n   greater than that of __scs_magic(task_scs(tsk)), the for loop may\n   access unmapped memory, potentially causing a kernel panic.  However,\n   this scenario is unlikely because task_struct is allocated via the slab\n   allocator (which typically returns lower addresses), while the shadow\n   call stack returned by task_scs(tsk) is allocated via vmalloc(which\n   typically returns higher addresses).\n\nHowever, since this is purely a debugging feature\n(CONFIG_DEBUG_STACK_USAGE), normal production systems should be not\nunaffected.  The bug only impacts developers and testers who are actively\ndebugging stack usage with this configuration enabled."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/scs.c"
                    ],
                    "versions": [
                        {
                            "version": "5bbaf9d1fcb9be696ee9a61636ab6803556c70f2",
                            "lessThan": "1727e8bd69103a68963a5613a0ddb6d8d37df5d3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5bbaf9d1fcb9be696ee9a61636ab6803556c70f2",
                            "lessThan": "cfdf6250b63b953b1d8e60814c8ca96c6f9d1c8c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5bbaf9d1fcb9be696ee9a61636ab6803556c70f2",
                            "lessThan": "57ba40b001be27786d0570dd292289df748b306b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5bbaf9d1fcb9be696ee9a61636ab6803556c70f2",
                            "lessThan": "062774439d442882b44f5eab8c256ad3423ef284",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5bbaf9d1fcb9be696ee9a61636ab6803556c70f2",
                            "lessThan": "9ef28943471a16e4f9646bc3e8e2de148e7d8d7b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5bbaf9d1fcb9be696ee9a61636ab6803556c70f2",
                            "lessThan": "a19fb3611e4c06624fc0f83ef19f4fb8d57d4751",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5bbaf9d1fcb9be696ee9a61636ab6803556c70f2",
                            "lessThan": "08bd4c46d5e63b78e77f2605283874bbe868ab19",
                            "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/scs.c"
                    ],
                    "versions": [
                        {
                            "version": "5.8",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.8",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.248",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.198",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.160",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.120",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.64",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.3",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19",
                            "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": "5.8",
                                    "versionEndExcluding": "5.10.248"
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionStartIncluding": "5.8",
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionStartIncluding": "5.8",
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                                },
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                                    "versionStartIncluding": "5.8",
                                    "versionEndExcluding": "6.19"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/1727e8bd69103a68963a5613a0ddb6d8d37df5d3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cfdf6250b63b953b1d8e60814c8ca96c6f9d1c8c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/57ba40b001be27786d0570dd292289df748b306b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/062774439d442882b44f5eab8c256ad3423ef284"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9ef28943471a16e4f9646bc3e8e2de148e7d8d7b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a19fb3611e4c06624fc0f83ef19f4fb8d57d4751"
                },
                {
                    "url": "https://git.kernel.org/stable/c/08bd4c46d5e63b78e77f2605283874bbe868ab19"
                }
            ],
            "title": "scs: fix a wrong parameter in __scs_magic",
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}