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    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23437",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:37:46.017Z",
        "datePublished": "2026-04-03T15:15:22.048Z",
        "dateUpdated": "2026-10-19T18:35:43.629Z"
    },
    "containers": {
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                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:21:45.565Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: shaper: protect late read accesses to the hierarchy\n\nWe look up a netdev during prep of Netlink ops (pre- callbacks)\nand take a ref to it. Then later in the body of the callback\nwe take its lock or RCU which are the actual protections.\n\nThis is not proper, a conversion from a ref to a locked netdev\nmust include a liveness check (a check if the netdev hasn't been\nunregistered already). Fix the read cases (those under RCU).\nWrites needs a separate change to protect from creating the\nhierarchy after flush has already run."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The vulnerable code is reached through local Generic Netlink `net-shaper` requests, not by remote network packets.\nAC:L - This is a race, but a local attacker can repeatedly issue read requests while causing or waiting for netdevice teardown; the vulnerable window is directly exercised by concurrent Netlink/device-lifetime activity.\nPR:L - The affected `GET` and dump read paths do not require `GENL_ADMIN_PERM`; a basic local user can open a Generic Netlink socket and issue these requests.\nUI:N - No victim user action is required once the attacker can send the Netlink requests.\nS:U - The bug affects kernel networking state within the same kernel security authority and does not cross a VM, IOMMU, or comparable boundary.\nC:H - The bug is a use-after-free of the net shaper hierarchy/shaper objects, and freed kernel heap contents may be exposed or shaped into useful read primitives.\nI:H - Use-after-free of kernel heap objects is memory corruption and may be exploitable through heap reuse for control-flow or data corruption.\nA:H - The stale hierarchy pointer can be dereferenced after teardown, making kernel oops/panic or other denial of service likely."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/shaper/shaper.c"
                    ],
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                            "lessThan": "581eee0890a8bde44f1fb78ad3e70502a897d583",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
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                            "lessThan": "348758ba74e6a348299965b16a97cfb817545cc0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b623f9f0f59652ea71fcb27d60b4c3b65126dbb",
                            "lessThan": "0f9ea7141f365b4f27226898e62220fb98ef8dc6",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/shaper/shaper.c"
                    ],
                    "versions": [
                        {
                            "version": "6.13",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.13",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.20",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.10",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "6.13",
                                    "versionEndExcluding": "6.18.20"
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                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.13",
                                    "versionEndExcluding": "6.19.10"
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.13",
                                    "versionEndExcluding": "7.0"
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/581eee0890a8bde44f1fb78ad3e70502a897d583"
                },
                {
                    "url": "https://git.kernel.org/stable/c/348758ba74e6a348299965b16a97cfb817545cc0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0f9ea7141f365b4f27226898e62220fb98ef8dc6"
                }
            ],
            "title": "net: shaper: protect late read accesses to the hierarchy",
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        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2026-23437",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2026-10-16T15:08:04.357382Z"
                            }
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                    }
                ],
                "problemTypes": [
                    {
                        "descriptions": [
                            {
                                "lang": "en",
                                "type": "CWE",
                                "cweId": "CWE-662",
                                "description": "CWE-662 Improper Synchronization"
                            }
                        ]
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
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                    "dateUpdated": "2026-10-19T18:35:43.629Z"
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