{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2021-47243",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-04-10T18:59:19.532Z",
        "datePublished": "2024-05-21T14:19:42.309Z",
        "dateUpdated": "2024-09-11T17:33:12.342Z"
    },
    "containers": {
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            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2024-05-29T05:04:33.819Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsch_cake: Fix out of bounds when parsing TCP options and header\n\nThe TCP option parser in cake qdisc (cake_get_tcpopt and\ncake_tcph_may_drop) could read one byte out of bounds. When the length\nis 1, the execution flow gets into the loop, reads one byte of the\nopcode, and if the opcode is neither TCPOPT_EOL nor TCPOPT_NOP, it reads\none more byte, which exceeds the length of 1.\n\nThis fix is inspired by commit 9609dad263f8 (\"ipv4: tcp_input: fix stack\nout of bounds when parsing TCP options.\").\n\nv2 changes:\n\nAdded doff validation in cake_get_tcphdr to avoid parsing garbage as TCP\nheader. Although it wasn't strictly an out-of-bounds access (memory was\nallocated), garbage values could be read where CAKE expected the TCP\nheader if doff was smaller than 5."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/sched/sch_cake.c"
                    ],
                    "versions": [
                        {
                            "version": "8b7138814f29",
                            "lessThan": "595897ef118d",
                            "status": "affected",
                            "versionType": "git"
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                        {
                            "version": "8b7138814f29",
                            "lessThan": "4cefa061fc63",
                            "status": "affected",
                            "versionType": "git"
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                        {
                            "version": "8b7138814f29",
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                            "status": "affected",
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                            "lessThan": "3371392c60e2",
                            "status": "affected",
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                        {
                            "version": "8b7138814f29",
                            "lessThan": "ba91c49dedbd",
                            "status": "affected",
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                    ]
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                {
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                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/sched/sch_cake.c"
                    ],
                    "versions": [
                        {
                            "version": "4.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.19",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "4.19.196",
                            "lessThanOrEqual": "4.19.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.4.128",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.10.46",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.12.13",
                            "lessThanOrEqual": "5.12.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.13",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/595897ef118d6fe66690c4fc5b572028c9da95b7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4cefa061fc63f4d2dff5ab4083f43857cd7a2335"
                },
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                    "url": "https://git.kernel.org/stable/c/3b491dd593d582ceeb27aa617600712a6bd14246"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3371392c60e2685af30bd4547badd880f5df2b3f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ba91c49dedbde758ba0b72f57ac90b06ddf8e548"
                }
            ],
            "title": "sch_cake: Fix out of bounds when parsing TCP options and header",
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                "title": "CVE Program Container",
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                                "id": "CVE-2021-47243",
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                                "options": [
                                    {
                                        "Exploitation": "none"
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                                ],
                                "version": "2.0.3",
                                "timestamp": "2024-09-10T15:39:57.595123Z"
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