{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-46857",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: Fix bridge mode operations when there are no VFs\n\nCurrently, trying to set the bridge mode attribute when numvfs=0 leads to a\ncrash:\n\nbridge link set dev eth2 hwmode vepa\n\n[  168.967392] BUG: kernel NULL pointer dereference, address: 0000000000000030\n[...]\n[  168.969989] RIP: 0010:mlx5_add_flow_rules+0x1f/0x300 [mlx5_core]\n[...]\n[  168.976037] Call Trace:\n[  168.976188]  <TASK>\n[  168.978620]  _mlx5_eswitch_set_vepa_locked+0x113/0x230 [mlx5_core]\n[  168.979074]  mlx5_eswitch_set_vepa+0x7f/0xa0 [mlx5_core]\n[  168.979471]  rtnl_bridge_setlink+0xe9/0x1f0\n[  168.979714]  rtnetlink_rcv_msg+0x159/0x400\n[  168.980451]  netlink_rcv_skb+0x54/0x100\n[  168.980675]  netlink_unicast+0x241/0x360\n[  168.980918]  netlink_sendmsg+0x1f6/0x430\n[  168.981162]  ____sys_sendmsg+0x3bb/0x3f0\n[  168.982155]  ___sys_sendmsg+0x88/0xd0\n[  168.985036]  __sys_sendmsg+0x59/0xa0\n[  168.985477]  do_syscall_64+0x79/0x150\n[  168.987273]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[  168.987773] RIP: 0033:0x7f8f7950f917\n\n(esw->fdb_table.legacy.vepa_fdb is null)\n\nThe bridge mode is only relevant when there are multiple functions per\nport. Therefore, prevent setting and getting this setting when there are no\nVFs.\n\nNote that after this change, there are no settings to change on the PF\ninterface using `bridge link` when there are no VFs, so the interface no\nlonger appears in the `bridge link` output."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "4b89251de024",
                                            "version_value": "52c4beb79e09"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.1",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.1",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.1.111",
                                                        "lessThanOrEqual": "6.1.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.6.52",
                                                        "lessThanOrEqual": "6.6.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.10.11",
                                                        "lessThanOrEqual": "6.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.11",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/52c4beb79e095e0631b5cac46ed48a2aefe51985",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/52c4beb79e095e0631b5cac46ed48a2aefe51985"
            },
            {
                "url": "https://git.kernel.org/stable/c/65feee671e37f3b6eda0b6af28f204b5bcf7fa50",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/65feee671e37f3b6eda0b6af28f204b5bcf7fa50"
            },
            {
                "url": "https://git.kernel.org/stable/c/505ae01f75f839b54329164bbfecf24cc1361b31",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/505ae01f75f839b54329164bbfecf24cc1361b31"
            },
            {
                "url": "https://git.kernel.org/stable/c/b1d305abef4640af1b4f1b4774d513cd81b10cfc",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/b1d305abef4640af1b4f1b4774d513cd81b10cfc"
            }
        ]
    },
    "generator": {
        "engine": "bippy-c9c4e1df01b2"
    }
}