{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-46196",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-13T15:03:33.104Z",
        "datePublished": "2026-05-28T09:36:49.293Z",
        "dateUpdated": "2026-10-15T01:21:17.317Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-19T11:59:59.175Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracepoint: balance regfunc() on func_add() failure in tracepoint_add_func()\n\nWhen a tracepoint goes through the 0 -> 1 transition, tracepoint_add_func()\ninvokes the subsystem's ext->regfunc() before attempting to install the\nnew probe via func_add(). If func_add() then fails (for example, when\nallocate_probes() cannot allocate a new probe array under memory pressure\nand returns -ENOMEM), the function returns the error without calling the\nmatching ext->unregfunc(), leaving the side effects of regfunc() behind\nwith no installed probe to justify them.\n\nFor syscall tracepoints this is particularly unpleasant: syscall_regfunc()\nbumps sys_tracepoint_refcount and sets SYSCALL_TRACEPOINT on every task.\nAfter a leaked failure, the refcount is stuck at a non-zero value with no\nconsumer, and every task continues paying the syscall trace entry/exit\noverhead until reboot. Other subsystems providing regfunc()/unregfunc()\npairs exhibit similarly scoped persistent state.\n\nMirror the existing 1 -> 0 cleanup and call ext->unregfunc() in the\nfunc_add() error path, gated on the same condition used there so the\nunwind is symmetric with the registration."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/tracepoint.c"
                    ],
                    "versions": [
                        {
                            "version": "8cf868affdc459beee1a941df0cfaba1673740e3",
                            "lessThan": "5787052e5f69beb649f3d6a80a8aa37d9e683e4e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8cf868affdc459beee1a941df0cfaba1673740e3",
                            "lessThan": "4f1756d043e56ea2e9a6c858fb290a0cf6fc2251",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8cf868affdc459beee1a941df0cfaba1673740e3",
                            "lessThan": "36ff362235307af95152d510b53c2d9b8773a342",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8cf868affdc459beee1a941df0cfaba1673740e3",
                            "lessThan": "247ed8a969f981bfba3112fd4bb441eaa6cef59c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8cf868affdc459beee1a941df0cfaba1673740e3",
                            "lessThan": "7bcadb3c2bc1cf60690e931aadd35fb7bd646a49",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8cf868affdc459beee1a941df0cfaba1673740e3",
                            "lessThan": "2c5b8eeea006eb694c81631cd5713d494b80be90",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8cf868affdc459beee1a941df0cfaba1673740e3",
                            "lessThan": "342829e042ac00f3d68d442ea92873fb6683f494",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8cf868affdc459beee1a941df0cfaba1673740e3",
                            "lessThan": "fad217e16fded7f3c09f8637b0f6a224d58b5f2e",
                            "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/tracepoint.c"
                    ],
                    "versions": [
                        {
                            "version": "4.10",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.10",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.259",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.210",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.176",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.140",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.88",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.30",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.7",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "4.10",
                                    "versionEndExcluding": "5.10.259"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.10",
                                    "versionEndExcluding": "5.15.210"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.10",
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                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                },
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                                    "versionStartIncluding": "4.10",
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                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.10",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
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                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/5787052e5f69beb649f3d6a80a8aa37d9e683e4e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4f1756d043e56ea2e9a6c858fb290a0cf6fc2251"
                },
                {
                    "url": "https://git.kernel.org/stable/c/36ff362235307af95152d510b53c2d9b8773a342"
                },
                {
                    "url": "https://git.kernel.org/stable/c/247ed8a969f981bfba3112fd4bb441eaa6cef59c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7bcadb3c2bc1cf60690e931aadd35fb7bd646a49"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2c5b8eeea006eb694c81631cd5713d494b80be90"
                },
                {
                    "url": "https://git.kernel.org/stable/c/342829e042ac00f3d68d442ea92873fb6683f494"
                },
                {
                    "url": "https://git.kernel.org/stable/c/fad217e16fded7f3c09f8637b0f6a224d58b5f2e"
                }
            ],
            "title": "tracepoint: balance regfunc() on func_add() failure in tracepoint_add_func()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        },
        "adp": [
            {
                "x_adpType": "supplier",
                "providerMetadata": {
                    "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
                    "shortName": "siemens-SADP",
                    "dateUpdated": "2026-10-15T01:21:17.317Z"
                },
                "affected": [
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                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "0",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    }
                ],
                "references": [
                    {
                        "url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
                    }
                ]
            }
        ]
    }
}