{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2021-47236",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-04-10T18:59:19.531Z",
        "datePublished": "2024-05-21T14:19:37.724Z",
        "dateUpdated": "2026-05-11T13:50:35.712Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T13:50:35.712Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: cdc_eem: fix tx fixup skb leak\n\nwhen usbnet transmit a skb, eem fixup it in eem_tx_fixup(),\nif skb_copy_expand() failed, it return NULL,\nusbnet_start_xmit() will have no chance to free original skb.\n\nfix it by free orginal skb in eem_tx_fixup() first,\nthen check skb clone status, if failed, return NULL to usbnet."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/usb/cdc_eem.c"
                    ],
                    "versions": [
                        {
                            "version": "9f722c0978b04acba209f8ca1896ad05814bc3a3",
                            "lessThan": "f12554b0ff639e74612cc01b3b4a049e098d2d65",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9f722c0978b04acba209f8ca1896ad05814bc3a3",
                            "lessThan": "14184ec5c958b589ba934da7363a2877879204df",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9f722c0978b04acba209f8ca1896ad05814bc3a3",
                            "lessThan": "1bcacd6088d61c0ac6a990d87975600a81f3247e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9f722c0978b04acba209f8ca1896ad05814bc3a3",
                            "lessThan": "f4e6a7f19c82f39b1803e91c54718f0d7143767d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9f722c0978b04acba209f8ca1896ad05814bc3a3",
                            "lessThan": "81de2ed06df8b5451e050fe6a318af3263dbff3f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9f722c0978b04acba209f8ca1896ad05814bc3a3",
                            "lessThan": "05b2b9f7d24b5663d9b47427fe1555bdafd3ea02",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9f722c0978b04acba209f8ca1896ad05814bc3a3",
                            "lessThan": "b4f7a9fc9d094c0c4a66f2ad7c37b1dbe9e78f88",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9f722c0978b04acba209f8ca1896ad05814bc3a3",
                            "lessThan": "c3b26fdf1b32f91c7a3bc743384b4a298ab53ad7",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/usb/cdc_eem.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.30",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.30",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.4.274",
                            "lessThanOrEqual": "4.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.9.274",
                            "lessThanOrEqual": "4.9.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.14.238",
                            "lessThanOrEqual": "4.14.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.19.196",
                            "lessThanOrEqual": "4.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.128",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.46",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.12.13",
                            "lessThanOrEqual": "5.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.13",
                            "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": "2.6.30",
                                    "versionEndExcluding": "4.4.274"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.30",
                                    "versionEndExcluding": "4.9.274"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.30",
                                    "versionEndExcluding": "4.14.238"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.30",
                                    "versionEndExcluding": "4.19.196"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.30",
                                    "versionEndExcluding": "5.4.128"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.30",
                                    "versionEndExcluding": "5.10.46"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.30",
                                    "versionEndExcluding": "5.12.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.30",
                                    "versionEndExcluding": "5.13"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/f12554b0ff639e74612cc01b3b4a049e098d2d65"
                },
                {
                    "url": "https://git.kernel.org/stable/c/14184ec5c958b589ba934da7363a2877879204df"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1bcacd6088d61c0ac6a990d87975600a81f3247e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f4e6a7f19c82f39b1803e91c54718f0d7143767d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/81de2ed06df8b5451e050fe6a318af3263dbff3f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/05b2b9f7d24b5663d9b47427fe1555bdafd3ea02"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b4f7a9fc9d094c0c4a66f2ad7c37b1dbe9e78f88"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c3b26fdf1b32f91c7a3bc743384b4a298ab53ad7"
                }
            ],
            "title": "net: cdc_eem: fix tx fixup skb leak",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2024-06-17T17:38:01.951930Z",
                                "id": "CVE-2021-47236",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2024-06-17T17:39:57.883Z"
                }
            },
            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2024-08-04T05:32:07.941Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://git.kernel.org/stable/c/f12554b0ff639e74612cc01b3b4a049e098d2d65",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://git.kernel.org/stable/c/14184ec5c958b589ba934da7363a2877879204df",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://git.kernel.org/stable/c/1bcacd6088d61c0ac6a990d87975600a81f3247e",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://git.kernel.org/stable/c/f4e6a7f19c82f39b1803e91c54718f0d7143767d",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://git.kernel.org/stable/c/81de2ed06df8b5451e050fe6a318af3263dbff3f",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://git.kernel.org/stable/c/05b2b9f7d24b5663d9b47427fe1555bdafd3ea02",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://git.kernel.org/stable/c/b4f7a9fc9d094c0c4a66f2ad7c37b1dbe9e78f88",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://git.kernel.org/stable/c/c3b26fdf1b32f91c7a3bc743384b4a298ab53ad7",
                        "tags": [
                            "x_transferred"
                        ]
                    }
                ]
            }
        ]
    }
}