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CVE-2022-49476 (GCVE-0-2022-49476)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:13 – Updated: 2026-05-11 19:00
VLAI
Title
mt76: mt7921: fix kernel crash at mt7921_pci_remove
Summary
In the Linux kernel, the following vulnerability has been resolved: mt76: mt7921: fix kernel crash at mt7921_pci_remove The crash log shown it is possible that mt7921_irq_handler is called while devm_free_irq is being handled so mt76_free_device need to be postponed until devm_free_irq is completed to solve the crash we free the mt76 device too early. [ 9299.339655] BUG: kernel NULL pointer dereference, address: 0000000000000008 [ 9299.339705] #PF: supervisor read access in kernel mode [ 9299.339735] #PF: error_code(0x0000) - not-present page [ 9299.339768] PGD 0 P4D 0 [ 9299.339786] Oops: 0000 [#1] SMP PTI [ 9299.339812] CPU: 1 PID: 1624 Comm: prepare-suspend Not tainted 5.15.14-1.fc32.qubes.x86_64 #1 [ 9299.339863] Hardware name: Xen HVM domU, BIOS 4.14.3 01/20/2022 [ 9299.339901] RIP: 0010:mt7921_irq_handler+0x1e/0x70 [mt7921e] [ 9299.340048] RSP: 0018:ffffa81b80c27cb0 EFLAGS: 00010082 [ 9299.340081] RAX: 0000000000000000 RBX: ffff98a4cb752020 RCX: ffffffffa96211c5 [ 9299.340123] RDX: 0000000000000000 RSI: 00000000000d4204 RDI: ffff98a4cb752020 [ 9299.340165] RBP: ffff98a4c28a62a4 R08: ffff98a4c37a96c0 R09: 0000000080150011 [ 9299.340207] R10: 0000000040000000 R11: 0000000000000000 R12: ffff98a4c4eaa080 [ 9299.340249] R13: ffff98a4c28a6360 R14: ffff98a4cb752020 R15: ffff98a4c28a6228 [ 9299.340297] FS: 00007260840d3740(0000) GS:ffff98a4ef700000(0000) knlGS:0000000000000000 [ 9299.340345] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 9299.340383] CR2: 0000000000000008 CR3: 0000000004c56001 CR4: 0000000000770ee0 [ 9299.340432] PKRU: 55555554 [ 9299.340449] Call Trace: [ 9299.340467] <TASK> [ 9299.340485] __free_irq+0x221/0x350 [ 9299.340527] free_irq+0x30/0x70 [ 9299.340553] devm_free_irq+0x55/0x80 [ 9299.340579] mt7921_pci_remove+0x2f/0x40 [mt7921e] [ 9299.340616] pci_device_remove+0x3b/0xa0 [ 9299.340651] __device_release_driver+0x17a/0x240 [ 9299.340686] device_driver_detach+0x3c/0xa0 [ 9299.340714] unbind_store+0x113/0x130 [ 9299.340740] kernfs_fop_write_iter+0x124/0x1b0 [ 9299.340775] new_sync_write+0x15c/0x1f0 [ 9299.340806] vfs_write+0x1d2/0x270 [ 9299.340831] ksys_write+0x67/0xe0 [ 9299.340857] do_syscall_64+0x3b/0x90 [ 9299.340887] entry_SYSCALL_64_after_hwframe+0x44/0xae
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 19:39 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5c14a5f944b91371961548b1907802f74a4d2e5c , < 09693f5b636fb3f6dd56fd943226fc1bbc600b51 (git)
Affected: 5c14a5f944b91371961548b1907802f74a4d2e5c , < 677e669973bf5460705bc65033445ea9f6615999 (git)
Affected: 5c14a5f944b91371961548b1907802f74a4d2e5c , < ad483ed9dd5193a54293269c852a29051813b7bd (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.17.14 , ≤ 5.17.* (semver)
Unaffected: 5.18.3 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
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              "content": {
                "id": "CVE-2022-49476",
                "options": [
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                    "Exploitation": "none"
                  },
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T19:39:36.188558Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
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            "descriptions": [
              {
                "cweId": "CWE-476",
                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
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        "providerMetadata": {
          "dateUpdated": "2025-10-01T19:46:45.825Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7921/pci.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "versionType": "git"
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        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7921/pci.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "lessThan": "5.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.17.14",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18.3",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19",
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmt76: mt7921: fix kernel crash at mt7921_pci_remove\n\nThe crash log shown it is possible that mt7921_irq_handler is called while\ndevm_free_irq is being handled so mt76_free_device need to be postponed\nuntil devm_free_irq is completed to solve the crash we free the mt76 device\ntoo early.\n\n[ 9299.339655] BUG: kernel NULL pointer dereference, address: 0000000000000008\n[ 9299.339705] #PF: supervisor read access in kernel mode\n[ 9299.339735] #PF: error_code(0x0000) - not-present page\n[ 9299.339768] PGD 0 P4D 0\n[ 9299.339786] Oops: 0000 [#1] SMP PTI\n[ 9299.339812] CPU: 1 PID: 1624 Comm: prepare-suspend Not tainted 5.15.14-1.fc32.qubes.x86_64 #1\n[ 9299.339863] Hardware name: Xen HVM domU, BIOS 4.14.3 01/20/2022\n[ 9299.339901] RIP: 0010:mt7921_irq_handler+0x1e/0x70 [mt7921e]\n[ 9299.340048] RSP: 0018:ffffa81b80c27cb0 EFLAGS: 00010082\n[ 9299.340081] RAX: 0000000000000000 RBX: ffff98a4cb752020 RCX: ffffffffa96211c5\n[ 9299.340123] RDX: 0000000000000000 RSI: 00000000000d4204 RDI: ffff98a4cb752020\n[ 9299.340165] RBP: ffff98a4c28a62a4 R08: ffff98a4c37a96c0 R09: 0000000080150011\n[ 9299.340207] R10: 0000000040000000 R11: 0000000000000000 R12: ffff98a4c4eaa080\n[ 9299.340249] R13: ffff98a4c28a6360 R14: ffff98a4cb752020 R15: ffff98a4c28a6228\n[ 9299.340297] FS: 00007260840d3740(0000) GS:ffff98a4ef700000(0000) knlGS:0000000000000000\n[ 9299.340345] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 9299.340383] CR2: 0000000000000008 CR3: 0000000004c56001 CR4: 0000000000770ee0\n[ 9299.340432] PKRU: 55555554\n[ 9299.340449] Call Trace:\n[ 9299.340467] \u003cTASK\u003e\n[ 9299.340485] __free_irq+0x221/0x350\n[ 9299.340527] free_irq+0x30/0x70\n[ 9299.340553] devm_free_irq+0x55/0x80\n[ 9299.340579] mt7921_pci_remove+0x2f/0x40 [mt7921e]\n[ 9299.340616] pci_device_remove+0x3b/0xa0\n[ 9299.340651] __device_release_driver+0x17a/0x240\n[ 9299.340686] device_driver_detach+0x3c/0xa0\n[ 9299.340714] unbind_store+0x113/0x130\n[ 9299.340740] kernfs_fop_write_iter+0x124/0x1b0\n[ 9299.340775] new_sync_write+0x15c/0x1f0\n[ 9299.340806] vfs_write+0x1d2/0x270\n[ 9299.340831] ksys_write+0x67/0xe0\n[ 9299.340857] do_syscall_64+0x3b/0x90\n[ 9299.340887] entry_SYSCALL_64_after_hwframe+0x44/0xae"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:00:37.664Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/09693f5b636fb3f6dd56fd943226fc1bbc600b51"
        },
        {
          "url": "https://git.kernel.org/stable/c/677e669973bf5460705bc65033445ea9f6615999"
        },
        {
          "url": "https://git.kernel.org/stable/c/ad483ed9dd5193a54293269c852a29051813b7bd"
        }
      ],
      "title": "mt76: mt7921: fix kernel crash at mt7921_pci_remove",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49476",
    "datePublished": "2025-02-26T02:13:18.013Z",
    "dateReserved": "2025-02-26T02:08:31.580Z",
    "dateUpdated": "2026-05-11T19:00:37.664Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-49476",
      "date": "2026-09-16",
      "epss": "0.00253",
      "percentile": "0.17018"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-18T14:55:49.000Z",
      "cve": "CVE-2022-49476",
      "id": "msrc_CVE-2022-49476",
      "initial_release_date": "2025-02-02T00:00:00.000Z",
      "product_status:known_not_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "mt76: mt7921: fix kernel crash at mt7921_pci_remove",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2022-49476.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49476\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:01:23.800\",\"lastModified\":\"2026-06-17T05:18:10.293\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmt76: mt7921: fix kernel crash at mt7921_pci_remove\\n\\nThe crash log shown it is possible that mt7921_irq_handler is called while\\ndevm_free_irq is being handled so mt76_free_device need to be postponed\\nuntil devm_free_irq is completed to solve the crash we free the mt76 device\\ntoo early.\\n\\n[ 9299.339655] BUG: kernel NULL pointer dereference, address: 0000000000000008\\n[ 9299.339705] #PF: supervisor read access in kernel mode\\n[ 9299.339735] #PF: error_code(0x0000) - not-present page\\n[ 9299.339768] PGD 0 P4D 0\\n[ 9299.339786] Oops: 0000 [#1] SMP PTI\\n[ 9299.339812] CPU: 1 PID: 1624 Comm: prepare-suspend Not tainted 5.15.14-1.fc32.qubes.x86_64 #1\\n[ 9299.339863] Hardware name: Xen HVM domU, BIOS 4.14.3 01/20/2022\\n[ 9299.339901] RIP: 0010:mt7921_irq_handler+0x1e/0x70 [mt7921e]\\n[ 9299.340048] RSP: 0018:ffffa81b80c27cb0 EFLAGS: 00010082\\n[ 9299.340081] RAX: 0000000000000000 RBX: ffff98a4cb752020 RCX: ffffffffa96211c5\\n[ 9299.340123] RDX: 0000000000000000 RSI: 00000000000d4204 RDI: ffff98a4cb752020\\n[ 9299.340165] RBP: ffff98a4c28a62a4 R08: ffff98a4c37a96c0 R09: 0000000080150011\\n[ 9299.340207] R10: 0000000040000000 R11: 0000000000000000 R12: ffff98a4c4eaa080\\n[ 9299.340249] R13: ffff98a4c28a6360 R14: ffff98a4cb752020 R15: ffff98a4c28a6228\\n[ 9299.340297] FS: 00007260840d3740(0000) GS:ffff98a4ef700000(0000) knlGS:0000000000000000\\n[ 9299.340345] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[ 9299.340383] CR2: 0000000000000008 CR3: 0000000004c56001 CR4: 0000000000770ee0\\n[ 9299.340432] PKRU: 55555554\\n[ 9299.340449] Call Trace:\\n[ 9299.340467] \u003cTASK\u003e\\n[ 9299.340485] __free_irq+0x221/0x350\\n[ 9299.340527] free_irq+0x30/0x70\\n[ 9299.340553] devm_free_irq+0x55/0x80\\n[ 9299.340579] mt7921_pci_remove+0x2f/0x40 [mt7921e]\\n[ 9299.340616] pci_device_remove+0x3b/0xa0\\n[ 9299.340651] __device_release_driver+0x17a/0x240\\n[ 9299.340686] device_driver_detach+0x3c/0xa0\\n[ 9299.340714] unbind_store+0x113/0x130\\n[ 9299.340740] kernfs_fop_write_iter+0x124/0x1b0\\n[ 9299.340775] new_sync_write+0x15c/0x1f0\\n[ 9299.340806] vfs_write+0x1d2/0x270\\n[ 9299.340831] ksys_write+0x67/0xe0\\n[ 9299.340857] do_syscall_64+0x3b/0x90\\n[ 9299.340887] entry_SYSCALL_64_after_hwframe+0x44/0xae\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mt76: mt7921: se corrige el fallo del kernel en mt7921_pci_remove El registro de fallos muestra que es posible que se llame a mt7921_irq_handler mientras se maneja devm_free_irq, por lo que mt76_free_device debe posponerse hasta que se complete devm_free_irq para resolver el fallo, liberamos el dispositivo mt76 demasiado pronto. [ 9299.339655] ERROR: desreferencia de puntero NULL del n\u00facleo, direcci\u00f3n: 0000000000000008 [ 9299.339705] #PF: acceso de lectura del supervisor en modo n\u00facleo [ 9299.339735] #PF: error_code(0x0000) - not-present page [ 9299.339768] PGD 0 P4D 0 [ 9299.339786] Oops: 0000 [#1] SMP PTI [ 9299.339812] CPU: 1 PID: 1624 Comm: prepare-suspend Not tainted 5.15.14-1.fc32.qubes.x86_64 #1 [ 9299.339863] Hardware name: Xen HVM domU, BIOS 4.14.3 01/20/2022 [ 9299.339901] RIP: 0010:mt7921_irq_handler+0x1e/0x70 [mt7921e] [ 9299.340048] RSP: 0018:ffffa81b80c27cb0 EFLAGS: 00010082 [ 9299.340081] RAX: 0000000000000000 RBX: ffff98a4cb752020 RCX: ffffffffa96211c5 [ 9299.340123] RDX: 0000000000000000 RSI: 00000000000d4204 RDI: ffff98a4cb752020 [ 9299.340165] RBP: ffff98a4c28a62a4 R08: ffff98a4c37a96c0 R09: 0000000080150011 [ 9299.340207] R10: 0000000040000000 R11: 0000000000000000 R12: ffff98a4c4eaa080 [ 9299.340249] R13: ffff98a4c28a6360 R14: ffff98a4cb752020 R15: ffff98a4c28a6228 [ 9299.340297] FS: 00007260840d3740(0000) GS:ffff98a4ef700000(0000) knlGS:0000000000000000 [ 9299.340345] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 9299.340383] CR2: 0000000000000008 CR3: 0000000004c56001 CR4: 0000000000770ee0 [ 9299.340432] PKRU: 55555554 [ 9299.340449] Call Trace: [ 9299.340467]  [ 9299.340485] __free_irq+0x221/0x350 [ 9299.340527] free_irq+0x30/0x70 [ 9299.340553] devm_free_irq+0x55/0x80 [ 9299.340579] mt7921_pci_remove+0x2f/0x40 [mt7921e] [ 9299.340616] pci_device_remove+0x3b/0xa0 [ 9299.340651] __device_release_driver+0x17a/0x240 [ 9299.340686] device_driver_detach+0x3c/0xa0 [ 9299.340714] unbind_store+0x113/0x130 [ 9299.340740] kernfs_fop_write_iter+0x124/0x1b0 [ 9299.340775] new_sync_write+0x15c/0x1f0 [ 9299.340806] vfs_write+0x1d2/0x270 [ 9299.340831] ksys_write+0x67/0xe0 [ 9299.340857] do_syscall_64+0x3b/0x90 [ 9299.340887] entry_SYSCALL_64_after_hwframe+0x44/0xae \"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/wireless/mediatek/mt76/mt7921/pci.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5c14a5f944b91371961548b1907802f74a4d2e5c\",\"lessThan\":\"09693f5b636fb3f6dd56fd943226fc1bbc600b51\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5c14a5f944b91371961548b1907802f74a4d2e5c\",\"lessThan\":\"677e669973bf5460705bc65033445ea9f6615999\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5c14a5f944b91371961548b1907802f74a4d2e5c\",\"lessThan\":\"ad483ed9dd5193a54293269c852a29051813b7bd\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/wireless/mediatek/mt76/mt7921/pci.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.17.14\",\"lessThanOrEqual\":\"5.17.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.18.3\",\"lessThanOrEqual\":\"5.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"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},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"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}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2025-10-01T19:39:36.188558Z\",\"id\":\"CVE-2022-49476\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.12\",\"versionEndExcluding\":\"5.17.14\",\"matchCriteriaId\":\"D037F2A7-2027-4A28-88EA-7BCC721762E9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.18\",\"versionEndExcluding\":\"5.18.3\",\"matchCriteriaId\":\"8E122216-2E9E-4B3E-B7B8-D575A45BA3C2\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/09693f5b636fb3f6dd56fd943226fc1bbc600b51\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/677e669973bf5460705bc65033445ea9f6615999\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ad483ed9dd5193a54293269c852a29051813b7bd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:15:05+00:00",
      "cve": "CVE-2022-49476",
      "id": "CVE-2022-49476",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "156",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mt76: mt7921: fix kernel crash at mt7921_pci_remove",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49476.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T01:30:56Z",
      "cve": "CVE-2022-49476",
      "id": "CVE-2022-49476",
      "initial_release_date": "2025-02-27T03:06:16Z",
      "product_status:known_affected": "425",
      "product_status:known_not_affected": "348",
      "product_status:recommended": "100",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49476",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49476.json",
      "version": "37"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-49476\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-01T19:39:36.188558Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-476\", \"description\": \"CWE-476 NULL Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-10-01T16:48:09.440Z\"}}], \"cna\": {\"title\": \"mt76: mt7921: fix kernel crash at mt7921_pci_remove\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5c14a5f944b91371961548b1907802f74a4d2e5c\", \"lessThan\": \"09693f5b636fb3f6dd56fd943226fc1bbc600b51\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5c14a5f944b91371961548b1907802f74a4d2e5c\", \"lessThan\": \"677e669973bf5460705bc65033445ea9f6615999\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5c14a5f944b91371961548b1907802f74a4d2e5c\", \"lessThan\": \"ad483ed9dd5193a54293269c852a29051813b7bd\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/wireless/mediatek/mt76/mt7921/pci.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.12\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.12\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.17.14\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.17.*\"}, {\"status\": \"unaffected\", \"version\": \"5.18.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.18.*\"}, {\"status\": \"unaffected\", \"version\": \"5.19\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/wireless/mediatek/mt76/mt7921/pci.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/09693f5b636fb3f6dd56fd943226fc1bbc600b51\"}, {\"url\": \"https://git.kernel.org/stable/c/677e669973bf5460705bc65033445ea9f6615999\"}, {\"url\": \"https://git.kernel.org/stable/c/ad483ed9dd5193a54293269c852a29051813b7bd\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmt76: mt7921: fix kernel crash at mt7921_pci_remove\\n\\nThe crash log shown it is possible that mt7921_irq_handler is called while\\ndevm_free_irq is being handled so mt76_free_device need to be postponed\\nuntil devm_free_irq is completed to solve the crash we free the mt76 device\\ntoo early.\\n\\n[ 9299.339655] BUG: kernel NULL pointer dereference, address: 0000000000000008\\n[ 9299.339705] #PF: supervisor read access in kernel mode\\n[ 9299.339735] #PF: error_code(0x0000) - not-present page\\n[ 9299.339768] PGD 0 P4D 0\\n[ 9299.339786] Oops: 0000 [#1] SMP PTI\\n[ 9299.339812] CPU: 1 PID: 1624 Comm: prepare-suspend Not tainted 5.15.14-1.fc32.qubes.x86_64 #1\\n[ 9299.339863] Hardware name: Xen HVM domU, BIOS 4.14.3 01/20/2022\\n[ 9299.339901] RIP: 0010:mt7921_irq_handler+0x1e/0x70 [mt7921e]\\n[ 9299.340048] RSP: 0018:ffffa81b80c27cb0 EFLAGS: 00010082\\n[ 9299.340081] RAX: 0000000000000000 RBX: ffff98a4cb752020 RCX: ffffffffa96211c5\\n[ 9299.340123] RDX: 0000000000000000 RSI: 00000000000d4204 RDI: ffff98a4cb752020\\n[ 9299.340165] RBP: ffff98a4c28a62a4 R08: ffff98a4c37a96c0 R09: 0000000080150011\\n[ 9299.340207] R10: 0000000040000000 R11: 0000000000000000 R12: ffff98a4c4eaa080\\n[ 9299.340249] R13: ffff98a4c28a6360 R14: ffff98a4cb752020 R15: ffff98a4c28a6228\\n[ 9299.340297] FS: 00007260840d3740(0000) GS:ffff98a4ef700000(0000) knlGS:0000000000000000\\n[ 9299.340345] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[ 9299.340383] CR2: 0000000000000008 CR3: 0000000004c56001 CR4: 0000000000770ee0\\n[ 9299.340432] PKRU: 55555554\\n[ 9299.340449] Call Trace:\\n[ 9299.340467] \u003cTASK\u003e\\n[ 9299.340485] __free_irq+0x221/0x350\\n[ 9299.340527] free_irq+0x30/0x70\\n[ 9299.340553] devm_free_irq+0x55/0x80\\n[ 9299.340579] mt7921_pci_remove+0x2f/0x40 [mt7921e]\\n[ 9299.340616] pci_device_remove+0x3b/0xa0\\n[ 9299.340651] __device_release_driver+0x17a/0x240\\n[ 9299.340686] device_driver_detach+0x3c/0xa0\\n[ 9299.340714] unbind_store+0x113/0x130\\n[ 9299.340740] kernfs_fop_write_iter+0x124/0x1b0\\n[ 9299.340775] new_sync_write+0x15c/0x1f0\\n[ 9299.340806] vfs_write+0x1d2/0x270\\n[ 9299.340831] ksys_write+0x67/0xe0\\n[ 9299.340857] do_syscall_64+0x3b/0x90\\n[ 9299.340887] entry_SYSCALL_64_after_hwframe+0x44/0xae\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.17.14\", \"versionStartIncluding\": \"5.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.18.3\", \"versionStartIncluding\": \"5.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.19\", \"versionStartIncluding\": \"5.12\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:00:37.664Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-49476\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:00:37.664Z\", \"dateReserved\": \"2025-02-26T02:08:31.580Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-02-26T02:13:18.013Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.

Sightings

Author Source Type Date Other

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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • 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.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.