CVE-2022-49876 (GCVE-0-2022-49876)
Vulnerability from cvelistv5
Published
2025-05-01 14:10
Modified
2025-05-04 08:47
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix general-protection-fault in ieee80211_subif_start_xmit() When device is running and the interface status is changed, the gpf issue is triggered. The problem triggering process is as follows: Thread A: Thread B ieee80211_runtime_change_iftype() process_one_work() ... ... ieee80211_do_stop() ... ... ... sdata->bss = NULL ... ... ieee80211_subif_start_xmit() ieee80211_multicast_to_unicast //!sdata->bss->multicast_to_unicast cause gpf issue When the interface status is changed, the sending queue continues to send packets. After the bss is set to NULL, the bss is accessed. As a result, this causes a general-protection-fault issue. The following is the stack information: general protection fault, probably for non-canonical address 0xdffffc000000002f: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000178-0x000000000000017f] Workqueue: mld mld_ifc_work RIP: 0010:ieee80211_subif_start_xmit+0x25b/0x1310 Call Trace: <TASK> dev_hard_start_xmit+0x1be/0x990 __dev_queue_xmit+0x2c9a/0x3b60 ip6_finish_output2+0xf92/0x1520 ip6_finish_output+0x6af/0x11e0 ip6_output+0x1ed/0x540 mld_sendpack+0xa09/0xe70 mld_ifc_work+0x71c/0xdb0 process_one_work+0x9bf/0x1710 worker_thread+0x665/0x1080 kthread+0x2e4/0x3a0 ret_from_fork+0x1f/0x30 </TASK>
References
Impacted products
Vendor Product Version
Linux Linux Version: f856373e2f31ffd340e47e2b00027bd4070f74b3
Version: f856373e2f31ffd340e47e2b00027bd4070f74b3
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          ],
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          "vendor": "Linux",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix general-protection-fault in ieee80211_subif_start_xmit()\n\nWhen device is running and the interface status is changed, the gpf issue\nis triggered. The problem triggering process is as follows:\nThread A:                           Thread B\nieee80211_runtime_change_iftype()   process_one_work()\n    ...                                 ...\n    ieee80211_do_stop()                 ...\n    ...                                 ...\n        sdata-\u003ebss = NULL               ...\n        ...                             ieee80211_subif_start_xmit()\n                                            ieee80211_multicast_to_unicast\n                                    //!sdata-\u003ebss-\u003emulticast_to_unicast\n                                      cause gpf issue\n\nWhen the interface status is changed, the sending queue continues to send\npackets. After the bss is set to NULL, the bss is accessed. As a result,\nthis causes a general-protection-fault issue.\n\nThe following is the stack information:\ngeneral protection fault, probably for non-canonical address\n0xdffffc000000002f: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000178-0x000000000000017f]\nWorkqueue: mld mld_ifc_work\nRIP: 0010:ieee80211_subif_start_xmit+0x25b/0x1310\nCall Trace:\n\u003cTASK\u003e\ndev_hard_start_xmit+0x1be/0x990\n__dev_queue_xmit+0x2c9a/0x3b60\nip6_finish_output2+0xf92/0x1520\nip6_finish_output+0x6af/0x11e0\nip6_output+0x1ed/0x540\nmld_sendpack+0xa09/0xe70\nmld_ifc_work+0x71c/0xdb0\nprocess_one_work+0x9bf/0x1710\nworker_thread+0x665/0x1080\nkthread+0x2e4/0x3a0\nret_from_fork+0x1f/0x30\n\u003c/TASK\u003e"
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      "providerMetadata": {
        "dateUpdated": "2025-05-04T08:47:35.559Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/780854186946e0de2be192ee7fa5125666533b3a"
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      ],
      "title": "wifi: mac80211: fix general-protection-fault in ieee80211_subif_start_xmit()",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49876",
    "datePublished": "2025-05-01T14:10:25.040Z",
    "dateReserved": "2025-05-01T14:05:17.238Z",
    "dateUpdated": "2025-05-04T08:47:35.559Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49876\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-01T15:16:12.550\",\"lastModified\":\"2025-05-07T13:21:31.450\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nwifi: mac80211: fix general-protection-fault in ieee80211_subif_start_xmit()\\n\\nWhen device is running and the interface status is changed, the gpf issue\\nis triggered. The problem triggering process is as follows:\\nThread A:                           Thread B\\nieee80211_runtime_change_iftype()   process_one_work()\\n    ...                                 ...\\n    ieee80211_do_stop()                 ...\\n    ...                                 ...\\n        sdata-\u003ebss = NULL               ...\\n        ...                             ieee80211_subif_start_xmit()\\n                                            ieee80211_multicast_to_unicast\\n                                    //!sdata-\u003ebss-\u003emulticast_to_unicast\\n                                      cause gpf issue\\n\\nWhen the interface status is changed, the sending queue continues to send\\npackets. After the bss is set to NULL, the bss is accessed. As a result,\\nthis causes a general-protection-fault issue.\\n\\nThe following is the stack information:\\ngeneral protection fault, probably for non-canonical address\\n0xdffffc000000002f: 0000 [#1] PREEMPT SMP KASAN\\nKASAN: null-ptr-deref in range [0x0000000000000178-0x000000000000017f]\\nWorkqueue: mld mld_ifc_work\\nRIP: 0010:ieee80211_subif_start_xmit+0x25b/0x1310\\nCall Trace:\\n\u003cTASK\u003e\\ndev_hard_start_xmit+0x1be/0x990\\n__dev_queue_xmit+0x2c9a/0x3b60\\nip6_finish_output2+0xf92/0x1520\\nip6_finish_output+0x6af/0x11e0\\nip6_output+0x1ed/0x540\\nmld_sendpack+0xa09/0xe70\\nmld_ifc_work+0x71c/0xdb0\\nprocess_one_work+0x9bf/0x1710\\nworker_thread+0x665/0x1080\\nkthread+0x2e4/0x3a0\\nret_from_fork+0x1f/0x30\\n\u003c/TASK\u003e\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: mac80211: fix general-protection-fault in ieee80211_subif_start_xmit() Cuando el dispositivo est\u00e1 en ejecuci\u00f3n y se cambia el estado de la interfaz, se activa el problema gpf. El proceso de activaci\u00f3n del problema es el siguiente: Hilo A: Hilo B ieee80211_runtime_change_iftype() process_one_work() ... ... ieee80211_do_stop() ... ... ... sdata-\u0026gt;bss = NULL ... ... ieee80211_subif_start_xmit() ieee80211_multicast_to_unicast //!sdata-\u0026gt;bss-\u0026gt;multicast_to_unicast cause gpf issue Cuando se cambia el estado de la interfaz, la cola de env\u00edo contin\u00faa enviando paquetes. Despu\u00e9s de que bss se establece en NULL, se accede a bss. Como resultado, esto causa un problema de general-protection-fault. La siguiente es la informaci\u00f3n de la pila: falla de protecci\u00f3n general, probablemente para la direcci\u00f3n no can\u00f3nica 0xdffffc000000002f: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref en el rango [0x0000000000000178-0x000000000000017f] Cola de trabajo: mld mld_ifc_work RIP: 0010:ieee80211_subif_start_xmit+0x25b/0x1310 Rastreo de llamadas:  dev_hard_start_xmit+0x1be/0x990 __dev_queue_xmit+0x2c9a/0x3b60 ip6_finish_output2+0xf92/0x1520 ip6_finish_output+0x6af/0x11e0 ip6_output+0x1ed/0x540 mld_sendpack+0xa09/0xe70 mld_ifc_work+0x71c/0xdb0 process_one_work+0x9bf/0x1710 worker_thread+0x665/0x1080 kthread+0x2e4/0x3a0 ret_from_fork+0x1f/0x30  \"}],\"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\":\"5.19\",\"versionEndExcluding\":\"6.0.9\",\"matchCriteriaId\":\"D0A4E4AD-3B87-42F8-BB1A-CCA3FC47367F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"E7E331DA-1FB0-4DEC-91AC-7DA69D461C11\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"17F0B248-42CF-4AE6-A469-BB1BAE7F4705\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"E2422816-0C14-4B5E-A1E6-A9D776E5C49B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"1C6E00FE-5FB9-4D20-A1A1-5A32128F9B76\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/03eb68c72cee249aeb7af7d04a83c033aca3d6d9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/780854186946e0de2be192ee7fa5125666533b3a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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