cve-2022-48876
Vulnerability from cvelistv5
Published
2024-08-21 06:10
Modified
2024-12-19 08:09
Severity ?
EPSS score ?
0.04% (0.07961)
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]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a57c981d9f24d2bd89eaa76dc477e8ca252e22e8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e66b7920aa5ac5b1a1997a454004ba9246a3c005Patch
Impacted products
Vendor Product Version
Linux Linux Version: b320d6c456ff2aa43491654407d448bcfa58ac9f
Version: b320d6c456ff2aa43491654407d448bcfa58ac9f
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   Linux Linux Version: 6.1
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{
   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: "2024-09-12T17:32:53.407Z",
               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: "b320d6c456ff2aa43491654407d448bcfa58ac9f",
                     versionType: "git",
                  },
                  {
                     lessThan: "e66b7920aa5ac5b1a1997a454004ba9246a3c005",
                     status: "affected",
                     version: "b320d6c456ff2aa43491654407d448bcfa58ac9f",
                     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->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]",
            },
         ],
         providerMetadata: {
            dateUpdated: "2024-12-19T08:09:40.181Z",
            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->link and rx->link_sta",
         x_generator: {
            engine: "bippy-5f407fcff5a0",
         },
      },
   },
   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: "2024-12-19T08:09:40.181Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
      fkie_nvd: {
         configurations: "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"6.1\", \"versionEndExcluding\": \"6.1.8\", \"matchCriteriaId\": \"0EF71645-1ABD-4584-8FEC-AF3D155E1F5B\"}]}]}]",
         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]\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: mac80211: corrige la inicializaci\\u00f3n de rx-&gt;link y rx-&gt;link_sta Hay algunas rutas de c\\u00f3digo que no inicializan rx-&gt;link_sta correctamente. Esto provoca un bloqueo en lugares que asumen que rx-&gt;link_sta es v\\u00e1lido si rx-&gt;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 &lt;48&gt; 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-&gt;link y rx-&gt;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-&gt;sta-&gt;sta.mlo]\"}]",
         id: "CVE-2022-48876",
         lastModified: "2024-08-29T02:41:34.627",
         metrics: "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 5.5, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 3.6}]}",
         published: "2024-08-21T07:15:04.500",
         references: "[{\"url\": \"https://git.kernel.org/stable/c/a57c981d9f24d2bd89eaa76dc477e8ca252e22e8\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/e66b7920aa5ac5b1a1997a454004ba9246a3c005\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}]",
         sourceIdentifier: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         vulnStatus: "Analyzed",
         weaknesses: "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-476\"}]}]",
      },
      nvd: "{\"cve\":{\"id\":\"CVE-2022-48876\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-08-21T07:15:04.500\",\"lastModified\":\"2024-08-29T02:41:34.627\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"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]\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: mac80211: corrige la inicialización de rx-&gt;link y rx-&gt;link_sta Hay algunas rutas de código que no inicializan rx-&gt;link_sta correctamente. Esto provoca un bloqueo en lugares que asumen que rx-&gt;link_sta es válido si rx-&gt;sta es válido. 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, dirección: 00000000000000a8 #PF: acceso de escritura del supervisor en modo kernel #PF: código_error(0x0002) - página 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] Código: 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 &lt;48&gt; 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 inicialización de rx-&gt;link y rx-&gt;link_sta es bastante complicada y duplicada en muchos lugares, límpiela usando una función auxiliar para configurarla. [eliminar comprobación innecesaria de rx-&gt;sta-&gt;sta.mlo]\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.1\",\"versionEndExcluding\":\"6.1.8\",\"matchCriteriaId\":\"0EF71645-1ABD-4584-8FEC-AF3D155E1F5B\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/a57c981d9f24d2bd89eaa76dc477e8ca252e22e8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e66b7920aa5ac5b1a1997a454004ba9246a3c005\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
      vulnrichment: {
         containers: "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"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\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:11.887Z\"}}], \"cna\": {\"title\": \"wifi: mac80211: fix initialization of rx->link and rx->link_sta\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"b320d6c456ff\", \"lessThan\": \"a57c981d9f24\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b320d6c456ff\", \"lessThan\": \"e66b7920aa5a\", \"versionType\": \"git\"}], \"programFiles\": [\"net/mac80211/rx.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.1\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.1\", \"versionType\": \"custom\"}, {\"status\": \"unaffected\", \"version\": \"6.1.8\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.2\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/mac80211/rx.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/a57c981d9f24d2bd89eaa76dc477e8ca252e22e8\"}, {\"url\": \"https://git.kernel.org/stable/c/e66b7920aa5ac5b1a1997a454004ba9246a3c005\"}], \"x_generator\": {\"engine\": \"bippy-c9c4e1df01b2\"}, \"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]\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-08-21T06:10:07.310Z\"}}}",
         cveMetadata: "{\"cveId\": \"CVE-2022-48876\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-09-12T17:32:53.407Z\", \"dateReserved\": \"2024-07-16T11:38:08.922Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-08-21T06:10:07.310Z\", \"assignerShortName\": \"Linux\"}",
         dataType: "CVE_RECORD",
         dataVersion: "5.1",
      },
   },
}


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