{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2022-48876",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-07-16T11:38:08.922Z",
        "datePublished": "2024-08-21T06:10:07.310Z",
        "dateUpdated": "2024-09-12T17:32:53.407Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2024-08-21T06:10:07.310Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix initialization of rx->link and rx->link_sta\n\nThere are some codepaths that do not initialize rx->link_sta properly. This\ncauses a crash in places which assume that rx->link_sta is valid if rx->sta\nis valid.\nOne known instance is triggered by __ieee80211_rx_h_amsdu being called from\nfast-rx. It results in a crash like this one:\n\n BUG: kernel NULL pointer dereference, address: 00000000000000a8\n #PF: supervisor write access in kernel mode\n #PF: error_code(0x0002) - not-present page PGD 0 P4D 0\n Oops: 0002 [#1] PREEMPT SMP PTI\n CPU: 1 PID: 506 Comm: mt76-usb-rx phy Tainted: G            E      6.1.0-debian64x+1.7 #3\n Hardware name: ZOTAC ZBOX-ID92/ZBOX-IQ01/ZBOX-ID92/ZBOX-IQ01, BIOS B220P007 05/21/2014\n RIP: 0010:ieee80211_deliver_skb+0x62/0x1f0 [mac80211]\n Code: 00 48 89 04 24 e8 9e a7 c3 df 89 c0 48 03 1c c5 a0 ea 39 a1 4c 01 6b 08 48 ff 03 48\n       83 7d 28 00 74 11 48 8b 45 30 48 63 55 44 <48> 83 84 d0 a8 00 00 00 01 41 8b 86 c0\n       11 00 00 8d 50 fd 83 fa 01\n RSP: 0018:ffff999040803b10 EFLAGS: 00010286\n RAX: 0000000000000000 RBX: ffffb9903f496480 RCX: 0000000000000000\n RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000\n RBP: ffff999040803ce0 R08: 0000000000000000 R09: 0000000000000000\n R10: 0000000000000000 R11: 0000000000000000 R12: ffff8d21828ac900\n R13: 000000000000004a R14: ffff8d2198ed89c0 R15: ffff8d2198ed8000\n FS:  0000000000000000(0000) GS:ffff8d24afe80000(0000) knlGS:0000000000000000\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00000000000000a8 CR3: 0000000429810002 CR4: 00000000001706e0\n Call Trace:\n  <TASK>\n  __ieee80211_rx_h_amsdu+0x1b5/0x240 [mac80211]\n  ? ieee80211_prepare_and_rx_handle+0xcdd/0x1320 [mac80211]\n  ? __local_bh_enable_ip+0x3b/0xa0\n  ieee80211_prepare_and_rx_handle+0xcdd/0x1320 [mac80211]\n  ? prepare_transfer+0x109/0x1a0 [xhci_hcd]\n  ieee80211_rx_list+0xa80/0xda0 [mac80211]\n  mt76_rx_complete+0x207/0x2e0 [mt76]\n  mt76_rx_poll_complete+0x357/0x5a0 [mt76]\n  mt76u_rx_worker+0x4f5/0x600 [mt76_usb]\n  ? mt76_get_min_avg_rssi+0x140/0x140 [mt76]\n  __mt76_worker_fn+0x50/0x80 [mt76]\n  kthread+0xed/0x120\n  ? kthread_complete_and_exit+0x20/0x20\n  ret_from_fork+0x22/0x30\n\nSince the initialization of rx->link and rx->link_sta is rather convoluted\nand duplicated in many places, clean it up by using a helper function to\nset it.\n\n[remove unnecessary rx->sta->sta.mlo check]"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/mac80211/rx.c"
                    ],
                    "versions": [
                        {
                            "version": "b320d6c456ff",
                            "lessThan": "a57c981d9f24",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b320d6c456ff",
                            "lessThan": "e66b7920aa5a",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/mac80211/rx.c"
                    ],
                    "versions": [
                        {
                            "version": "6.1",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.1",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.1.8",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.2",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/a57c981d9f24d2bd89eaa76dc477e8ca252e22e8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e66b7920aa5ac5b1a1997a454004ba9246a3c005"
                }
            ],
            "title": "wifi: mac80211: fix initialization of rx->link and rx->link_sta",
            "x_generator": {
                "engine": "bippy-c9c4e1df01b2"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2022-48876",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2024-09-10T16:05:13.063011Z"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2024-09-12T17:32:53.407Z"
                }
            }
        ]
    }
}