{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2021-47102",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-02-29T22:33:44.301Z",
        "datePublished": "2024-03-04T18:10:56.018Z",
        "dateUpdated": "2026-05-11T13:48:06.160Z"
    },
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                "dateUpdated": "2026-05-11T13:48:06.160Z"
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            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: marvell: prestera: fix incorrect structure access\n\nIn line:\n\tupper = info->upper_dev;\nWe access upper_dev field, which is related only for particular events\n(e.g. event == NETDEV_CHANGEUPPER). So, this line cause invalid memory\naccess for another events,\nwhen ptr is not netdev_notifier_changeupper_info.\n\nThe KASAN logs are as follows:\n\n[   30.123165] BUG: KASAN: stack-out-of-bounds in prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera]\n[   30.133336] Read of size 8 at addr ffff80000cf772b0 by task udevd/778\n[   30.139866]\n[   30.141398] CPU: 0 PID: 778 Comm: udevd Not tainted 5.16.0-rc3 #6\n[   30.147588] Hardware name: DNI AmazonGo1 A7040 board (DT)\n[   30.153056] Call trace:\n[   30.155547]  dump_backtrace+0x0/0x2c0\n[   30.159320]  show_stack+0x18/0x30\n[   30.162729]  dump_stack_lvl+0x68/0x84\n[   30.166491]  print_address_description.constprop.0+0x74/0x2b8\n[   30.172346]  kasan_report+0x1e8/0x250\n[   30.176102]  __asan_load8+0x98/0xe0\n[   30.179682]  prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera]\n[   30.186847]  prestera_netdev_event_handler+0x1b4/0x1c0 [prestera]\n[   30.193313]  raw_notifier_call_chain+0x74/0xa0\n[   30.197860]  call_netdevice_notifiers_info+0x68/0xc0\n[   30.202924]  register_netdevice+0x3cc/0x760\n[   30.207190]  register_netdev+0x24/0x50\n[   30.211015]  prestera_device_register+0x8a0/0xba0 [prestera]"
                }
            ],
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                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/marvell/prestera/prestera_main.c"
                    ],
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                            "version": "3d5048cc54bd250cfbb358c37fcc011135977887",
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                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/marvell/prestera/prestera_main.c"
                    ],
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                    "url": "https://git.kernel.org/stable/c/5c553a0cd1263e4da5f220d80fa713fc3959c1d0"
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                    "url": "https://git.kernel.org/stable/c/2efc2256febf214e7b2bdaa21fe6c3c3146acdcb"
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            "title": "net: marvell: prestera: fix incorrect structure access",
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