{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2022-49649",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen/netback: avoid entering xenvif_rx_next_skb() with an empty rx queue\n\nxenvif_rx_next_skb() is expecting the rx queue not being empty, but\nin case the loop in xenvif_rx_action() is doing multiple iterations,\nthe availability of another skb in the rx queue is not being checked.\n\nThis can lead to crashes:\n\n[40072.537261] BUG: unable to handle kernel NULL pointer dereference at 0000000000000080\n[40072.537407] IP: xenvif_rx_skb+0x23/0x590 [xen_netback]\n[40072.537534] PGD 0 P4D 0\n[40072.537644] Oops: 0000 [#1] SMP NOPTI\n[40072.537749] CPU: 0 PID: 12505 Comm: v1-c40247-q2-gu Not tainted 4.12.14-122.121-default #1 SLE12-SP5\n[40072.537867] Hardware name: HP ProLiant DL580 Gen9/ProLiant DL580 Gen9, BIOS U17 11/23/2021\n[40072.537999] task: ffff880433b38100 task.stack: ffffc90043d40000\n[40072.538112] RIP: e030:xenvif_rx_skb+0x23/0x590 [xen_netback]\n[40072.538217] RSP: e02b:ffffc90043d43de0 EFLAGS: 00010246\n[40072.538319] RAX: 0000000000000000 RBX: ffffc90043cd7cd0 RCX: 00000000000000f7\n[40072.538430] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffc90043d43df8\n[40072.538531] RBP: 000000000000003f R08: 000077ff80000000 R09: 0000000000000008\n[40072.538644] R10: 0000000000007ff0 R11: 00000000000008f6 R12: ffffc90043ce2708\n[40072.538745] R13: 0000000000000000 R14: ffffc90043d43ed0 R15: ffff88043ea748c0\n[40072.538861] FS: 0000000000000000(0000) GS:ffff880484600000(0000) knlGS:0000000000000000\n[40072.538988] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033\n[40072.539088] CR2: 0000000000000080 CR3: 0000000407ac8000 CR4: 0000000000040660\n[40072.539211] Call Trace:\n[40072.539319] xenvif_rx_action+0x71/0x90 [xen_netback]\n[40072.539429] xenvif_kthread_guest_rx+0x14a/0x29c [xen_netback]\n\nFix that by stopping the loop in case the rx queue becomes empty."
            }
        ]
    },
    "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": "98f6d57ced73b723551568262019f1d6c8771f20",
                                            "version_value": "c0fcceb5f3f1ec197c014fe218c2f28108cacd27"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "4.9",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "4.9",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "4.9.324",
                                                        "lessThanOrEqual": "4.9.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "4.14.289",
                                                        "lessThanOrEqual": "4.14.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "4.19.253",
                                                        "lessThanOrEqual": "4.19.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.4.207",
                                                        "lessThanOrEqual": "5.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.10.132",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.15.56",
                                                        "lessThanOrEqual": "5.15.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.18.13",
                                                        "lessThanOrEqual": "5.18.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.19",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/c0fcceb5f3f1ec197c014fe218c2f28108cacd27",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/c0fcceb5f3f1ec197c014fe218c2f28108cacd27"
            },
            {
                "url": "https://git.kernel.org/stable/c/d5320c6a27aa975aff740f9cb481dcbde48f4348",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/d5320c6a27aa975aff740f9cb481dcbde48f4348"
            },
            {
                "url": "https://git.kernel.org/stable/c/5a071aefd6414af5a20321ab58a0557b81993687",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/5a071aefd6414af5a20321ab58a0557b81993687"
            },
            {
                "url": "https://git.kernel.org/stable/c/7425479d20f9e96f7c3ec8e8a93fe0d7478724cb",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/7425479d20f9e96f7c3ec8e8a93fe0d7478724cb"
            },
            {
                "url": "https://git.kernel.org/stable/c/b9c32a6886af79d6e0ad87a7b01800ed079cdd02",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/b9c32a6886af79d6e0ad87a7b01800ed079cdd02"
            },
            {
                "url": "https://git.kernel.org/stable/c/b99174ac57fe5d8867448c03b23828e63f24cb1c",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/b99174ac57fe5d8867448c03b23828e63f24cb1c"
            },
            {
                "url": "https://git.kernel.org/stable/c/f0b5c819b062df8bf5f2acf4697e3871cb3722da",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/f0b5c819b062df8bf5f2acf4697e3871cb3722da"
            },
            {
                "url": "https://git.kernel.org/stable/c/94e8100678889ab428e68acadf042de723f094b9",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/94e8100678889ab428e68acadf042de723f094b9"
            }
        ]
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}