CVE-2022-48876 (GCVE-0-2022-48876)

Vulnerability from cvelistv5 – Published: 2024-08-21 06:10 – Updated: 2026-05-11 18:48
VLAI
Title
wifi: mac80211: fix initialization of rx->link and rx->link_sta
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix initialization of rx->link and rx->link_sta There are some codepaths that do not initialize rx->link_sta properly. This causes a crash in places which assume that rx->link_sta is valid if rx->sta is valid. One known instance is triggered by __ieee80211_rx_h_amsdu being called from fast-rx. It results in a crash like this one: BUG: kernel NULL pointer dereference, address: 00000000000000a8 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 0 P4D 0 Oops: 0002 [#1] PREEMPT SMP PTI CPU: 1 PID: 506 Comm: mt76-usb-rx phy Tainted: G E 6.1.0-debian64x+1.7 #3 Hardware name: ZOTAC ZBOX-ID92/ZBOX-IQ01/ZBOX-ID92/ZBOX-IQ01, BIOS B220P007 05/21/2014 RIP: 0010:ieee80211_deliver_skb+0x62/0x1f0 [mac80211] 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 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 11 00 00 8d 50 fd 83 fa 01 RSP: 0018:ffff999040803b10 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffb9903f496480 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff999040803ce0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8d21828ac900 R13: 000000000000004a R14: ffff8d2198ed89c0 R15: ffff8d2198ed8000 FS: 0000000000000000(0000) GS:ffff8d24afe80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000000a8 CR3: 0000000429810002 CR4: 00000000001706e0 Call Trace: <TASK> __ieee80211_rx_h_amsdu+0x1b5/0x240 [mac80211] ? ieee80211_prepare_and_rx_handle+0xcdd/0x1320 [mac80211] ? __local_bh_enable_ip+0x3b/0xa0 ieee80211_prepare_and_rx_handle+0xcdd/0x1320 [mac80211] ? prepare_transfer+0x109/0x1a0 [xhci_hcd] ieee80211_rx_list+0xa80/0xda0 [mac80211] mt76_rx_complete+0x207/0x2e0 [mt76] mt76_rx_poll_complete+0x357/0x5a0 [mt76] mt76u_rx_worker+0x4f5/0x600 [mt76_usb] ? mt76_get_min_avg_rssi+0x140/0x140 [mt76] __mt76_worker_fn+0x50/0x80 [mt76] kthread+0xed/0x120 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork+0x22/0x30 Since the initialization of rx->link and rx->link_sta is rather convoluted and duplicated in many places, clean it up by using a helper function to set it. [remove unnecessary rx->sta->sta.mlo check]
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:05 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ccdde7c74ffd7e8bdd3cf685bbfa41231c8e3131 , < a57c981d9f24d2bd89eaa76dc477e8ca252e22e8 (git)
Affected: ccdde7c74ffd7e8bdd3cf685bbfa41231c8e3131 , < e66b7920aa5ac5b1a1997a454004ba9246a3c005 (git)
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Linux Linux Affected: 6.1
Unaffected: 0 , < 6.1 (semver)
Unaffected: 6.1.8 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix initialization of rx-\u003elink and rx-\u003elink_sta\n\nThere are some codepaths that do not initialize rx-\u003elink_sta properly. This\ncauses a crash in places which assume that rx-\u003elink_sta is valid if rx-\u003esta\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 \u003c48\u003e 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  \u003cTASK\u003e\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-\u003elink and rx-\u003elink_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-\u003esta-\u003esta.mlo check]"
        },
        {
          "lang": "es",
          "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: mac80211: corrige la inicializaci\u00f3n de rx-\u0026gt;link y rx-\u0026gt;link_sta Hay algunas rutas de c\u00f3digo que no inicializan rx-\u0026gt;link_sta correctamente. Esto provoca un bloqueo en lugares que asumen que rx-\u0026gt;link_sta es v\u00e1lido si rx-\u0026gt;sta es v\u00e1lido. Una instancia conocida se activa cuando se llama a __ieee80211_rx_h_amsdu desde fast-rx. Resulta en un bloqueo como este: ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 00000000000000a8 #PF: acceso de escritura del supervisor en modo kernel #PF: c\u00f3digo_error(0x0002) - p\u00e1gina no presente PGD 0 P4D 0 Ups: 0002 [#1 ] PREEMPT SMP PTI CPU: 1 PID: 506 Comm: mt76-usb-rx phy Contaminado: GE 6.1.0-debian64x+1.7 #3 Nombre del hardware: ZOTAC ZBOX-ID92/ZBOX-IQ01/ZBOX-ID92/ZBOX-IQ01, BIOS B220P007 21/05/2014 RIP: 0010:ieee80211_deliver_skb+0x62/0x1f0 [mac80211] C\u00f3digo: 00 48 89 04 24 e8 9e a7 c3 df 89 c0 48 03 1c c5 a0 ea 39 a1 4c 01 08 48 y siguientes 03 48 83 7d 28 00 74 11 48 8b 45 30 48 63 55 44 \u0026lt;48\u0026gt; 83 84 d0 a8 00 00 00 01 41 8b 86 c0 11 00 00 8d 50 fd 83 fa 01 RSP:ffff999040803b10 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffb9903f496480 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000000 RBP: ffff999040803ce0 R08: 00000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8d21828ac900 R13: 000000000000004a R14: 98ed89c0 R15: ffff8d2198ed8000 FS: 0000000000000000(0000) GS:ffff8d24afe80000( 0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000000a8 CR3: 0000000429810002 CR4: 00000000001 706e0 Seguimiento de llamadas:  __ieee80211_rx_h_amsdu+0x1b5/0x240 [mac80211] ? ieee80211_prepare_and_rx_handle+0xcdd/0x1320 [mac80211]? __local_bh_enable_ip+0x3b/0xa0 ieee80211_prepare_and_rx_handle+0xcdd/0x1320 [mac80211]? prepare_transfer+0x109/0x1a0 [xhci_hcd] ieee80211_rx_list+0xa80/0xda0 [mac80211] mt76_rx_complete+0x207/0x2e0 [mt76] mt76_rx_poll_complete+0x357/0x5a0 [mt76u_rx_worker] +0x4f5/0x600 [mt76_usb] ? mt76_get_min_avg_rssi+0x140/0x140 [mt76] __mt76_worker_fn+0x50/0x80 [mt76] kthread+0xed/0x120 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork+0x22/0x30 Dado que la inicializaci\u00f3n de rx-\u0026gt;link y rx-\u0026gt;link_sta es bastante complicada y duplicada en muchos lugares, l\u00edmpiela usando una funci\u00f3n auxiliar para configurarla. [eliminar comprobaci\u00f3n innecesaria de rx-\u0026gt;sta-\u0026gt;sta.mlo]"
        }
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      "id": "CVE-2022-48876",
      "lastModified": "2024-08-29T02:41:34.627",
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              "integrityImpact": "NONE",
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              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix initialization of rx-\u003elink and rx-\u003elink_sta\n\nThere are some codepaths that do not initialize rx-\u003elink_sta properly. This\ncauses a crash in places which assume that rx-\u003elink_sta is valid if rx-\u003esta\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 \u003c48\u003e 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  \u003cTASK\u003e\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-\u003elink and rx-\u003elink_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-\u003esta-\u003esta.mlo check]"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: mac80211: corrige la inicializaci\u00f3n de rx-\u0026gt;link y rx-\u0026gt;link_sta Hay algunas rutas de c\u00f3digo que no inicializan rx-\u0026gt;link_sta correctamente. Esto provoca un bloqueo en lugares que asumen que rx-\u0026gt;link_sta es v\u00e1lido si rx-\u0026gt;sta es v\u00e1lido. Una instancia conocida se activa cuando se llama a __ieee80211_rx_h_amsdu desde fast-rx. Resulta en un bloqueo como este: ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 00000000000000a8 #PF: acceso de escritura del supervisor en modo kernel #PF: c\u00f3digo_error(0x0002) - p\u00e1gina no presente PGD 0 P4D 0 Ups: 0002 [#1 ] PREEMPT SMP PTI CPU: 1 PID: 506 Comm: mt76-usb-rx phy Contaminado: GE 6.1.0-debian64x+1.7 #3 Nombre del hardware: ZOTAC ZBOX-ID92/ZBOX-IQ01/ZBOX-ID92/ZBOX-IQ01, BIOS B220P007 21/05/2014 RIP: 0010:ieee80211_deliver_skb+0x62/0x1f0 [mac80211] C\u00f3digo: 00 48 89 04 24 e8 9e a7 c3 df 89 c0 48 03 1c c5 a0 ea 39 a1 4c 01 08 48 y siguientes 03 48 83 7d 28 00 74 11 48 8b 45 30 48 63 55 44 \u0026lt;48\u0026gt; 83 84 d0 a8 00 00 00 01 41 8b 86 c0 11 00 00 8d 50 fd 83 fa 01 RSP:ffff999040803b10 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffb9903f496480 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000000 RBP: ffff999040803ce0 R08: 00000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8d21828ac900 R13: 000000000000004a R14: 98ed89c0 R15: ffff8d2198ed8000 FS: 0000000000000000(0000) GS:ffff8d24afe80000( 0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000000a8 CR3: 0000000429810002 CR4: 00000000001 706e0 Seguimiento de llamadas:  __ieee80211_rx_h_amsdu+0x1b5/0x240 [mac80211] ? ieee80211_prepare_and_rx_handle+0xcdd/0x1320 [mac80211]? __local_bh_enable_ip+0x3b/0xa0 ieee80211_prepare_and_rx_handle+0xcdd/0x1320 [mac80211]? prepare_transfer+0x109/0x1a0 [xhci_hcd] ieee80211_rx_list+0xa80/0xda0 [mac80211] mt76_rx_complete+0x207/0x2e0 [mt76] mt76_rx_poll_complete+0x357/0x5a0 [mt76u_rx_worker] +0x4f5/0x600 [mt76_usb] ? mt76_get_min_avg_rssi+0x140/0x140 [mt76] __mt76_worker_fn+0x50/0x80 [mt76] kthread+0xed/0x120 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork+0x22/0x30 Dado que la inicializaci\u00f3n de rx-\u0026gt;link y rx-\u0026gt;link_sta es bastante complicada y duplicada en muchos lugares, l\u00edmpiela usando una funci\u00f3n auxiliar para configurarla. [eliminar comprobaci\u00f3n innecesaria de rx-\u0026gt;sta-\u0026gt;sta.mlo]"
          }
        ],
        "id": "CVE-2022-48876",
        "lastModified": "2026-06-17T05:16:29.053",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2022-48876",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T16:05:13.063011Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2024-08-21T07:15:04.500",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/a57c981d9f24d2bd89eaa76dc477e8ca252e22e8"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/e66b7920aa5ac5b1a1997a454004ba9246a3c005"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T14:33:34+00:00",
      "cve": "CVE-2022-48876",
      "id": "CVE-2022-48876",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: mac80211: fix initialization of rx-\u0026gt;link and rx-\u0026gt;link_sta",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-48876.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-12T17:11:52Z",
      "cve": "CVE-2022-48876",
      "id": "CVE-2022-48876",
      "initial_release_date": "2024-08-22T03:29:33Z",
      "product_status:known_not_affected": "372",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-48876",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-48876.json",
      "version": "19"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2022-48876",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-09-10T16:05:13.063011Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2024-09-11T12:42:11.887Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "net/mac80211/rx.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "a57c981d9f24d2bd89eaa76dc477e8ca252e22e8",
                  "status": "affected",
                  "version": "ccdde7c74ffd7e8bdd3cf685bbfa41231c8e3131",
                  "versionType": "git"
                },
                {
                  "lessThan": "e66b7920aa5ac5b1a1997a454004ba9246a3c005",
                  "status": "affected",
                  "version": "ccdde7c74ffd7e8bdd3cf685bbfa41231c8e3131",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "net/mac80211/rx.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "6.1"
                },
                {
                  "lessThan": "6.1",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.8",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.2",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix initialization of rx-\u003elink and rx-\u003elink_sta\n\nThere are some codepaths that do not initialize rx-\u003elink_sta properly. This\ncauses a crash in places which assume that rx-\u003elink_sta is valid if rx-\u003esta\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 \u003c48\u003e 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  \u003cTASK\u003e\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-\u003elink and rx-\u003elink_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-\u003esta-\u003esta.mlo check]"
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-04-09T14:50:54.714Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/a57c981d9f24d2bd89eaa76dc477e8ca252e22e8"
            },
            {
              "url": "https://git.kernel.org/stable/c/e66b7920aa5ac5b1a1997a454004ba9246a3c005"
            }
          ],
          "title": "wifi: mac80211: fix initialization of rx-\u003elink and rx-\u003elink_sta",
          "x_generator": {
            "engine": "bippy-7c5fe7eed585"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-48876",
        "datePublished": "2024-08-21T06:10:07.310Z",
        "dateReserved": "2024-07-16T11:38:08.922Z",
        "dateUpdated": "2025-04-09T14:50:54.714Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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