CVE-2022-49788 (GCVE-0-2022-49788)
Vulnerability from cvelistv5
Published
2025-05-01 14:09
Modified
2025-05-04 08:45
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: misc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram() `struct vmci_event_qp` allocated by qp_notify_peer() contains padding, which may carry uninitialized data to the userspace, as observed by KMSAN: BUG: KMSAN: kernel-infoleak in instrument_copy_to_user ./include/linux/instrumented.h:121 instrument_copy_to_user ./include/linux/instrumented.h:121 _copy_to_user+0x5f/0xb0 lib/usercopy.c:33 copy_to_user ./include/linux/uaccess.h:169 vmci_host_do_receive_datagram drivers/misc/vmw_vmci/vmci_host.c:431 vmci_host_unlocked_ioctl+0x33d/0x43d0 drivers/misc/vmw_vmci/vmci_host.c:925 vfs_ioctl fs/ioctl.c:51 ... Uninit was stored to memory at: kmemdup+0x74/0xb0 mm/util.c:131 dg_dispatch_as_host drivers/misc/vmw_vmci/vmci_datagram.c:271 vmci_datagram_dispatch+0x4f8/0xfc0 drivers/misc/vmw_vmci/vmci_datagram.c:339 qp_notify_peer+0x19a/0x290 drivers/misc/vmw_vmci/vmci_queue_pair.c:1479 qp_broker_attach drivers/misc/vmw_vmci/vmci_queue_pair.c:1662 qp_broker_alloc+0x2977/0x2f30 drivers/misc/vmw_vmci/vmci_queue_pair.c:1750 vmci_qp_broker_alloc+0x96/0xd0 drivers/misc/vmw_vmci/vmci_queue_pair.c:1940 vmci_host_do_alloc_queuepair drivers/misc/vmw_vmci/vmci_host.c:488 vmci_host_unlocked_ioctl+0x24fd/0x43d0 drivers/misc/vmw_vmci/vmci_host.c:927 ... Local variable ev created at: qp_notify_peer+0x54/0x290 drivers/misc/vmw_vmci/vmci_queue_pair.c:1456 qp_broker_attach drivers/misc/vmw_vmci/vmci_queue_pair.c:1662 qp_broker_alloc+0x2977/0x2f30 drivers/misc/vmw_vmci/vmci_queue_pair.c:1750 Bytes 28-31 of 48 are uninitialized Memory access of size 48 starts at ffff888035155e00 Data copied to user address 0000000020000100 Use memset() to prevent the infoleaks. Also speculatively fix qp_notify_peer_local(), which may suffer from the same problem.
References
Impacted products
Vendor Product Version
Linux Linux Version: 06164d2b72aa752ce4633184b3e0d97601017135
Version: 06164d2b72aa752ce4633184b3e0d97601017135
Version: 06164d2b72aa752ce4633184b3e0d97601017135
Version: 06164d2b72aa752ce4633184b3e0d97601017135
Version: 06164d2b72aa752ce4633184b3e0d97601017135
Version: 06164d2b72aa752ce4633184b3e0d97601017135
Version: 06164d2b72aa752ce4633184b3e0d97601017135
Version: 06164d2b72aa752ce4633184b3e0d97601017135
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{
  "containers": {
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        {
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          "product": "Linux",
          "programFiles": [
            "drivers/misc/vmw_vmci/vmci_queue_pair.c"
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              "version": "4.9.334",
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              "status": "unaffected",
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              "version": "5.15.80",
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              "version": "6.0.10",
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              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
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      "cpeApplicability": [
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          "nodes": [
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                  "versionEndExcluding": "4.19.267",
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                  "versionEndExcluding": "5.4.225",
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                  "versionEndExcluding": "6.0.10",
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                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "3.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram()\n\n`struct vmci_event_qp` allocated by qp_notify_peer() contains padding,\nwhich may carry uninitialized data to the userspace, as observed by\nKMSAN:\n\n  BUG: KMSAN: kernel-infoleak in instrument_copy_to_user ./include/linux/instrumented.h:121\n   instrument_copy_to_user ./include/linux/instrumented.h:121\n   _copy_to_user+0x5f/0xb0 lib/usercopy.c:33\n   copy_to_user ./include/linux/uaccess.h:169\n   vmci_host_do_receive_datagram drivers/misc/vmw_vmci/vmci_host.c:431\n   vmci_host_unlocked_ioctl+0x33d/0x43d0 drivers/misc/vmw_vmci/vmci_host.c:925\n   vfs_ioctl fs/ioctl.c:51\n  ...\n\n  Uninit was stored to memory at:\n   kmemdup+0x74/0xb0 mm/util.c:131\n   dg_dispatch_as_host drivers/misc/vmw_vmci/vmci_datagram.c:271\n   vmci_datagram_dispatch+0x4f8/0xfc0 drivers/misc/vmw_vmci/vmci_datagram.c:339\n   qp_notify_peer+0x19a/0x290 drivers/misc/vmw_vmci/vmci_queue_pair.c:1479\n   qp_broker_attach drivers/misc/vmw_vmci/vmci_queue_pair.c:1662\n   qp_broker_alloc+0x2977/0x2f30 drivers/misc/vmw_vmci/vmci_queue_pair.c:1750\n   vmci_qp_broker_alloc+0x96/0xd0 drivers/misc/vmw_vmci/vmci_queue_pair.c:1940\n   vmci_host_do_alloc_queuepair drivers/misc/vmw_vmci/vmci_host.c:488\n   vmci_host_unlocked_ioctl+0x24fd/0x43d0 drivers/misc/vmw_vmci/vmci_host.c:927\n  ...\n\n  Local variable ev created at:\n   qp_notify_peer+0x54/0x290 drivers/misc/vmw_vmci/vmci_queue_pair.c:1456\n   qp_broker_attach drivers/misc/vmw_vmci/vmci_queue_pair.c:1662\n   qp_broker_alloc+0x2977/0x2f30 drivers/misc/vmw_vmci/vmci_queue_pair.c:1750\n\n  Bytes 28-31 of 48 are uninitialized\n  Memory access of size 48 starts at ffff888035155e00\n  Data copied to user address 0000000020000100\n\nUse memset() to prevent the infoleaks.\n\nAlso speculatively fix qp_notify_peer_local(), which may suffer from the\nsame problem."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T08:45:22.950Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7ccf7229b96fadc3a185d1391f814a604c7ef609"
        },
        {
          "url": "https://git.kernel.org/stable/c/f04586c2315cfd03d72ad0395705435e7ed07b1a"
        },
        {
          "url": "https://git.kernel.org/stable/c/5a275528025ae4bc7e2232866856dfebf84b2fad"
        },
        {
          "url": "https://git.kernel.org/stable/c/e7061dd1fef2dfb6458cd521aef27aa66f510d31"
        },
        {
          "url": "https://git.kernel.org/stable/c/62634b43d3c4e1bf62fd540196f7081bf0885c0a"
        },
        {
          "url": "https://git.kernel.org/stable/c/8e2f33c598370bcf828bab4d667d1d38bcd3c57d"
        },
        {
          "url": "https://git.kernel.org/stable/c/76c50d77b928a33e5290aaa9fdc10e88254ff8c7"
        },
        {
          "url": "https://git.kernel.org/stable/c/e5b0d06d9b10f5f43101bd6598b076c347f9295f"
        }
      ],
      "title": "misc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49788",
    "datePublished": "2025-05-01T14:09:20.506Z",
    "dateReserved": "2025-05-01T14:05:17.223Z",
    "dateUpdated": "2025-05-04T08:45:22.950Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49788\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-01T15:16:02.027\",\"lastModified\":\"2025-05-02T13:53:20.943\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmisc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram()\\n\\n`struct vmci_event_qp` allocated by qp_notify_peer() contains padding,\\nwhich may carry uninitialized data to the userspace, as observed by\\nKMSAN:\\n\\n  BUG: KMSAN: kernel-infoleak in instrument_copy_to_user ./include/linux/instrumented.h:121\\n   instrument_copy_to_user ./include/linux/instrumented.h:121\\n   _copy_to_user+0x5f/0xb0 lib/usercopy.c:33\\n   copy_to_user ./include/linux/uaccess.h:169\\n   vmci_host_do_receive_datagram drivers/misc/vmw_vmci/vmci_host.c:431\\n   vmci_host_unlocked_ioctl+0x33d/0x43d0 drivers/misc/vmw_vmci/vmci_host.c:925\\n   vfs_ioctl fs/ioctl.c:51\\n  ...\\n\\n  Uninit was stored to memory at:\\n   kmemdup+0x74/0xb0 mm/util.c:131\\n   dg_dispatch_as_host drivers/misc/vmw_vmci/vmci_datagram.c:271\\n   vmci_datagram_dispatch+0x4f8/0xfc0 drivers/misc/vmw_vmci/vmci_datagram.c:339\\n   qp_notify_peer+0x19a/0x290 drivers/misc/vmw_vmci/vmci_queue_pair.c:1479\\n   qp_broker_attach drivers/misc/vmw_vmci/vmci_queue_pair.c:1662\\n   qp_broker_alloc+0x2977/0x2f30 drivers/misc/vmw_vmci/vmci_queue_pair.c:1750\\n   vmci_qp_broker_alloc+0x96/0xd0 drivers/misc/vmw_vmci/vmci_queue_pair.c:1940\\n   vmci_host_do_alloc_queuepair drivers/misc/vmw_vmci/vmci_host.c:488\\n   vmci_host_unlocked_ioctl+0x24fd/0x43d0 drivers/misc/vmw_vmci/vmci_host.c:927\\n  ...\\n\\n  Local variable ev created at:\\n   qp_notify_peer+0x54/0x290 drivers/misc/vmw_vmci/vmci_queue_pair.c:1456\\n   qp_broker_attach drivers/misc/vmw_vmci/vmci_queue_pair.c:1662\\n   qp_broker_alloc+0x2977/0x2f30 drivers/misc/vmw_vmci/vmci_queue_pair.c:1750\\n\\n  Bytes 28-31 of 48 are uninitialized\\n  Memory access of size 48 starts at ffff888035155e00\\n  Data copied to user address 0000000020000100\\n\\nUse memset() to prevent the infoleaks.\\n\\nAlso speculatively fix qp_notify_peer_local(), which may suffer from the\\nsame problem.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: misc/vmw_vmci: se corrige una fuga de informaci\u00f3n en vmci_host_do_receive_datagram() `struct vmci_event_qp` asignado por qp_notify_peer() que contiene relleno, que puede llevar datos no inicializados al espacio de usuario, como lo observ\u00f3 KMSAN: ERROR: KMSAN: fuga de informaci\u00f3n del kernel en instrument_copy_to_user ./include/linux/instrumented.h:121 instrument_copy_to_user ./include/linux/instrumented.h:121 _copy_to_user+0x5f/0xb0 lib/usercopy.c:33 copy_to_user ./include/linux/uaccess.h:169 vmci_host_do_receive_datagram drivers/misc/vmw_vmci/vmci_host.c:431 vmci_host_unlocked_ioctl+0x33d/0x43d0 drivers/misc/vmw_vmci/vmci_host.c:925 vfs_ioctl fs/ioctl.c:51 ... Uninit se almacen\u00f3 en la memoria en: kmemdup+0x74/0xb0 mm/util.c:131 dg_dispatch_as_host drivers/misc/vmw_vmci/vmci_datagram.c:271 vmci_datagram_dispatch+0x4f8/0xfc0 drivers/misc/vmw_vmci/vmci_datagram.c:339 qp_notify_peer+0x19a/0x290 drivers/misc/vmw_vmci/vmci_queue_pair.c:1479 qp_broker_attach controladores/misc/vmw_vmci/vmci_queue_pair.c:1662 qp_broker_alloc+0x2977/0x2f30 controladores/misc/vmw_vmci/vmci_queue_pair.c:1750 vmci_qp_broker_alloc+0x96/0xd0 controladores/misc/vmw_vmci/vmci_queue_pair.c:1940 vmci_host_do_alloc_queuepair controladores/misc/vmw_vmci/vmci_host.c:488 vmci_host_unlocked_ioctl+0x24fd/0x43d0 controladores/misc/vmw_vmci/vmci_host.c:927 ... Variable local ev creada en: qp_notify_peer+0x54/0x290 drivers/misc/vmw_vmci/vmci_queue_pair.c:1456 qp_broker_attach drivers/misc/vmw_vmci/vmci_queue_pair.c:1662 qp_broker_alloc+0x2977/0x2f30 drivers/misc/vmw_vmci/vmci_queue_pair.c:1750 Bytes 28-31 de 48 sin inicializar. El acceso a memoria de tama\u00f1o 48 comienza en ffff888035155e00. Datos copiados a la direcci\u00f3n de usuario 0000000020000100. Use memset() para evitar las filtraciones de informaci\u00f3n. Tambi\u00e9n se especula que se debe corregir qp_notify_peer_local(), que podr\u00eda presentar el mismo problema.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5a275528025ae4bc7e2232866856dfebf84b2fad\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/62634b43d3c4e1bf62fd540196f7081bf0885c0a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/76c50d77b928a33e5290aaa9fdc10e88254ff8c7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7ccf7229b96fadc3a185d1391f814a604c7ef609\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8e2f33c598370bcf828bab4d667d1d38bcd3c57d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e5b0d06d9b10f5f43101bd6598b076c347f9295f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e7061dd1fef2dfb6458cd521aef27aa66f510d31\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f04586c2315cfd03d72ad0395705435e7ed07b1a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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