{
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    "cveMetadata": {
        "cveId": "CVE-2021-47231",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-04-10T18:59:19.530Z",
        "datePublished": "2024-05-21T14:19:34.413Z",
        "dateUpdated": "2024-08-15T15:15:31.419Z"
    },
    "containers": {
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            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2024-05-29T05:04:20.985Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: mcba_usb: fix memory leak in mcba_usb\n\nSyzbot reported memory leak in SocketCAN driver for Microchip CAN BUS\nAnalyzer Tool. The problem was in unfreed usb_coherent.\n\nIn mcba_usb_start() 20 coherent buffers are allocated and there is\nnothing, that frees them:\n\n1) In callback function the urb is resubmitted and that's all\n2) In disconnect function urbs are simply killed, but URB_FREE_BUFFER\n   is not set (see mcba_usb_start) and this flag cannot be used with\n   coherent buffers.\n\nFail log:\n| [ 1354.053291][ T8413] mcba_usb 1-1:0.0 can0: device disconnected\n| [ 1367.059384][ T8420] kmemleak: 20 new suspected memory leaks (see /sys/kernel/debug/kmem)\n\nSo, all allocated buffers should be freed with usb_free_coherent()\nexplicitly\n\nNOTE:\nThe same pattern for allocating and freeing coherent buffers\nis used in drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/can/usb/mcba_usb.c"
                    ],
                    "versions": [
                        {
                            "version": "51f3baad7de9",
                            "lessThan": "89df95ce32be",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "51f3baad7de9",
                            "lessThan": "a115198caaab",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "51f3baad7de9",
                            "lessThan": "6f87c0e21ad2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "51f3baad7de9",
                            "lessThan": "6bd3d80d1f01",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "51f3baad7de9",
                            "lessThan": "d0760a4ef856",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "51f3baad7de9",
                            "lessThan": "91c02557174b",
                            "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/can/usb/mcba_usb.c"
                    ],
                    "versions": [
                        {
                            "version": "4.12",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.12",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "4.14.238",
                            "lessThanOrEqual": "4.14.*",
                            "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/89df95ce32be204eef2e7d4b2f6fb552fb191a68"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a115198caaab6d663bef75823a3c5f0802306d60"
                },
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                    "url": "https://git.kernel.org/stable/c/6f87c0e21ad20dd3d22108e33db1c552dfa352a0"
                },
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                    "url": "https://git.kernel.org/stable/c/6bd3d80d1f019cefa7011056c54b323f1d8b8e83"
                },
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                    "url": "https://git.kernel.org/stable/c/d0760a4ef85697bc756d06eae17ae27f3f055401"
                },
                {
                    "url": "https://git.kernel.org/stable/c/91c02557174be7f72e46ed7311e3bea1939840b0"
                }
            ],
            "title": "can: mcba_usb: fix memory leak in mcba_usb",
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                    "dateUpdated": "2024-08-04T05:32:07.366Z"
                },
                "title": "CVE Program Container",
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                "metrics": [
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                            "type": "ssvc",
                            "content": {
                                "timestamp": "2024-05-31T18:50:07.041810Z",
                                "id": "CVE-2021-47231",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
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                                "role": "CISA Coordinator",
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                "title": "CISA ADP Vulnrichment",
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