CVE-2022-50626 (GCVE-0-2022-50626)
Vulnerability from cvelistv5
Published
2025-12-08 01:16
Modified
2025-12-23 13:30
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: media: dvb-usb: fix memory leak in dvb_usb_adapter_init() Syzbot reports a memory leak in "dvb_usb_adapter_init()". The leak is due to not accounting for and freeing current iteration's adapter->priv in case of an error. Currently if an error occurs, it will exit before incrementing "num_adapters_initalized", which is used as a reference counter to free all adap->priv in "dvb_usb_adapter_exit()". There are multiple error paths that can exit from before incrementing the counter. Including the error handling paths for "dvb_usb_adapter_stream_init()", "dvb_usb_adapter_dvb_init()" and "dvb_usb_adapter_frontend_init()" within "dvb_usb_adapter_init()". This means that in case of an error in any of these functions the current iteration is not accounted for and the current iteration's adap->priv is not freed. Fix this by freeing the current iteration's adap->priv in the "stream_init_err:" label in the error path. The rest of the (accounted for) adap->priv objects are freed in dvb_usb_adapter_exit() as expected using the num_adapters_initalized variable. Syzbot report: BUG: memory leak unreferenced object 0xffff8881172f1a00 (size 512): comm "kworker/0:2", pid 139, jiffies 4294994873 (age 10.960s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff844af012>] dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:75 [inline] [<ffffffff844af012>] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:184 [inline] [<ffffffff844af012>] dvb_usb_device_init.cold+0x4e5/0x79e drivers/media/usb/dvb-usb/dvb-usb-init.c:308 [<ffffffff830db21d>] dib0700_probe+0x8d/0x1b0 drivers/media/usb/dvb-usb/dib0700_core.c:883 [<ffffffff82d3fdc7>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<ffffffff8274ab37>] call_driver_probe drivers/base/dd.c:542 [inline] [<ffffffff8274ab37>] really_probe.part.0+0xe7/0x310 drivers/base/dd.c:621 [<ffffffff8274ae6c>] really_probe drivers/base/dd.c:583 [inline] [<ffffffff8274ae6c>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:752 [<ffffffff8274af6a>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:782 [<ffffffff8274b786>] __device_attach_driver+0xf6/0x140 drivers/base/dd.c:899 [<ffffffff82747c87>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427 [<ffffffff8274b352>] __device_attach+0x122/0x260 drivers/base/dd.c:970 [<ffffffff827498f6>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:487 [<ffffffff82745cdb>] device_add+0x5fb/0xdf0 drivers/base/core.c:3405 [<ffffffff82d3d202>] usb_set_configuration+0x8f2/0xb80 drivers/usb/core/message.c:2170 [<ffffffff82d4dbfc>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238 [<ffffffff82d3f49c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293 [<ffffffff8274ab37>] call_driver_probe drivers/base/dd.c:542 [inline] [<ffffffff8274ab37>] really_probe.part.0+0xe7/0x310 drivers/base/dd.c:621 [<ffffffff8274ae6c>] really_probe drivers/base/dd.c:583 [inline] [<ffffffff8274ae6c>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:752
References
Impacted products
Vendor Product Version
Linux Linux Version: 4d43e13f723e12734257277cc38497fab1efc605
Version: 4d43e13f723e12734257277cc38497fab1efc605
Version: 4d43e13f723e12734257277cc38497fab1efc605
Version: 4d43e13f723e12734257277cc38497fab1efc605
Version: 4d43e13f723e12734257277cc38497fab1efc605
Version: 4d43e13f723e12734257277cc38497fab1efc605
Version: 4d43e13f723e12734257277cc38497fab1efc605
Version: 4d43e13f723e12734257277cc38497fab1efc605
Version: 4d43e13f723e12734257277cc38497fab1efc605
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{
  "containers": {
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        {
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          "programFiles": [
            "drivers/media/usb/dvb-usb/dvb-usb-init.c"
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          ],
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          "vendor": "Linux",
          "versions": [
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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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\nmedia: dvb-usb: fix memory leak in dvb_usb_adapter_init()\n\nSyzbot reports a memory leak in \"dvb_usb_adapter_init()\".\nThe leak is due to not accounting for and freeing current iteration\u0027s\nadapter-\u003epriv in case of an error. Currently if an error occurs,\nit will exit before incrementing \"num_adapters_initalized\",\nwhich is used as a reference counter to free all adap-\u003epriv\nin \"dvb_usb_adapter_exit()\". There are multiple error paths that\ncan exit from before incrementing the counter. Including the\nerror handling paths for \"dvb_usb_adapter_stream_init()\",\n\"dvb_usb_adapter_dvb_init()\" and \"dvb_usb_adapter_frontend_init()\"\nwithin \"dvb_usb_adapter_init()\".\n\nThis means that in case of an error in any of these functions the\ncurrent iteration is not accounted for and the current iteration\u0027s\nadap-\u003epriv is not freed.\n\nFix this by freeing the current iteration\u0027s adap-\u003epriv in the\n\"stream_init_err:\" label in the error path. The rest of the\n(accounted for) adap-\u003epriv objects are freed in dvb_usb_adapter_exit()\nas expected using the num_adapters_initalized variable.\n\nSyzbot report:\n\nBUG: memory leak\nunreferenced object 0xffff8881172f1a00 (size 512):\n  comm \"kworker/0:2\", pid 139, jiffies 4294994873 (age 10.960s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\nbacktrace:\n    [\u003cffffffff844af012\u003e] dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:75 [inline]\n    [\u003cffffffff844af012\u003e] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:184 [inline]\n    [\u003cffffffff844af012\u003e] dvb_usb_device_init.cold+0x4e5/0x79e drivers/media/usb/dvb-usb/dvb-usb-init.c:308\n    [\u003cffffffff830db21d\u003e] dib0700_probe+0x8d/0x1b0 drivers/media/usb/dvb-usb/dib0700_core.c:883\n    [\u003cffffffff82d3fdc7\u003e] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396\n    [\u003cffffffff8274ab37\u003e] call_driver_probe drivers/base/dd.c:542 [inline]\n    [\u003cffffffff8274ab37\u003e] really_probe.part.0+0xe7/0x310 drivers/base/dd.c:621\n    [\u003cffffffff8274ae6c\u003e] really_probe drivers/base/dd.c:583 [inline]\n    [\u003cffffffff8274ae6c\u003e] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:752\n    [\u003cffffffff8274af6a\u003e] driver_probe_device+0x2a/0x120 drivers/base/dd.c:782\n    [\u003cffffffff8274b786\u003e] __device_attach_driver+0xf6/0x140 drivers/base/dd.c:899\n    [\u003cffffffff82747c87\u003e] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427\n    [\u003cffffffff8274b352\u003e] __device_attach+0x122/0x260 drivers/base/dd.c:970\n    [\u003cffffffff827498f6\u003e] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:487\n    [\u003cffffffff82745cdb\u003e] device_add+0x5fb/0xdf0 drivers/base/core.c:3405\n    [\u003cffffffff82d3d202\u003e] usb_set_configuration+0x8f2/0xb80 drivers/usb/core/message.c:2170\n    [\u003cffffffff82d4dbfc\u003e] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238\n    [\u003cffffffff82d3f49c\u003e] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293\n    [\u003cffffffff8274ab37\u003e] call_driver_probe drivers/base/dd.c:542 [inline]\n    [\u003cffffffff8274ab37\u003e] really_probe.part.0+0xe7/0x310 drivers/base/dd.c:621\n    [\u003cffffffff8274ae6c\u003e] really_probe drivers/base/dd.c:583 [inline]\n    [\u003cffffffff8274ae6c\u003e] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:752"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-23T13:30:21.884Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/733bc9e226da2a7f43b10031b8ebfc26d89ec4bd"
        },
        {
          "url": "https://git.kernel.org/stable/c/e5a49140035591d13ff57a7537c65217e5af0d15"
        },
        {
          "url": "https://git.kernel.org/stable/c/21b6b0c9f3796e6917e90db403dae9e74025fc40"
        },
        {
          "url": "https://git.kernel.org/stable/c/17217737c174883dd975885ab4bee4b00f517239"
        },
        {
          "url": "https://git.kernel.org/stable/c/7d7ab25ead969594df05fb09ee46ca931d46c5c8"
        },
        {
          "url": "https://git.kernel.org/stable/c/d0af6220bb1eed8225a5511de5a3bd386b94afa4"
        },
        {
          "url": "https://git.kernel.org/stable/c/e5d01eb6dc2f699a395d3e731c58a9b3bb4e269f"
        },
        {
          "url": "https://git.kernel.org/stable/c/93bbf2ed428142aa9a9693721230b28571678bf8"
        },
        {
          "url": "https://git.kernel.org/stable/c/94d90fb06b94a90c176270d38861bcba34ce377d"
        }
      ],
      "title": "media: dvb-usb: fix memory leak in dvb_usb_adapter_init()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50626",
    "datePublished": "2025-12-08T01:16:40.754Z",
    "dateReserved": "2025-12-08T01:14:55.191Z",
    "dateUpdated": "2025-12-23T13:30:21.884Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50626\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-08T02:15:48.653\",\"lastModified\":\"2025-12-08T18:26:19.900\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmedia: dvb-usb: fix memory leak in dvb_usb_adapter_init()\\n\\nSyzbot reports a memory leak in \\\"dvb_usb_adapter_init()\\\".\\nThe leak is due to not accounting for and freeing current iteration\u0027s\\nadapter-\u003epriv in case of an error. Currently if an error occurs,\\nit will exit before incrementing \\\"num_adapters_initalized\\\",\\nwhich is used as a reference counter to free all adap-\u003epriv\\nin \\\"dvb_usb_adapter_exit()\\\". There are multiple error paths that\\ncan exit from before incrementing the counter. Including the\\nerror handling paths for \\\"dvb_usb_adapter_stream_init()\\\",\\n\\\"dvb_usb_adapter_dvb_init()\\\" and \\\"dvb_usb_adapter_frontend_init()\\\"\\nwithin \\\"dvb_usb_adapter_init()\\\".\\n\\nThis means that in case of an error in any of these functions the\\ncurrent iteration is not accounted for and the current iteration\u0027s\\nadap-\u003epriv is not freed.\\n\\nFix this by freeing the current iteration\u0027s adap-\u003epriv in the\\n\\\"stream_init_err:\\\" label in the error path. The rest of the\\n(accounted for) adap-\u003epriv objects are freed in dvb_usb_adapter_exit()\\nas expected using the num_adapters_initalized variable.\\n\\nSyzbot report:\\n\\nBUG: memory leak\\nunreferenced object 0xffff8881172f1a00 (size 512):\\n  comm \\\"kworker/0:2\\\", pid 139, jiffies 4294994873 (age 10.960s)\\n  hex dump (first 32 bytes):\\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\\nbacktrace:\\n    [\u003cffffffff844af012\u003e] dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:75 [inline]\\n    [\u003cffffffff844af012\u003e] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:184 [inline]\\n    [\u003cffffffff844af012\u003e] dvb_usb_device_init.cold+0x4e5/0x79e drivers/media/usb/dvb-usb/dvb-usb-init.c:308\\n    [\u003cffffffff830db21d\u003e] dib0700_probe+0x8d/0x1b0 drivers/media/usb/dvb-usb/dib0700_core.c:883\\n    [\u003cffffffff82d3fdc7\u003e] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396\\n    [\u003cffffffff8274ab37\u003e] call_driver_probe drivers/base/dd.c:542 [inline]\\n    [\u003cffffffff8274ab37\u003e] really_probe.part.0+0xe7/0x310 drivers/base/dd.c:621\\n    [\u003cffffffff8274ae6c\u003e] really_probe drivers/base/dd.c:583 [inline]\\n    [\u003cffffffff8274ae6c\u003e] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:752\\n    [\u003cffffffff8274af6a\u003e] driver_probe_device+0x2a/0x120 drivers/base/dd.c:782\\n    [\u003cffffffff8274b786\u003e] __device_attach_driver+0xf6/0x140 drivers/base/dd.c:899\\n    [\u003cffffffff82747c87\u003e] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427\\n    [\u003cffffffff8274b352\u003e] __device_attach+0x122/0x260 drivers/base/dd.c:970\\n    [\u003cffffffff827498f6\u003e] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:487\\n    [\u003cffffffff82745cdb\u003e] device_add+0x5fb/0xdf0 drivers/base/core.c:3405\\n    [\u003cffffffff82d3d202\u003e] usb_set_configuration+0x8f2/0xb80 drivers/usb/core/message.c:2170\\n    [\u003cffffffff82d4dbfc\u003e] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238\\n    [\u003cffffffff82d3f49c\u003e] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293\\n    [\u003cffffffff8274ab37\u003e] call_driver_probe drivers/base/dd.c:542 [inline]\\n    [\u003cffffffff8274ab37\u003e] really_probe.part.0+0xe7/0x310 drivers/base/dd.c:621\\n    [\u003cffffffff8274ae6c\u003e] really_probe drivers/base/dd.c:583 [inline]\\n    [\u003cffffffff8274ae6c\u003e] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:752\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/17217737c174883dd975885ab4bee4b00f517239\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/21b6b0c9f3796e6917e90db403dae9e74025fc40\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/733bc9e226da2a7f43b10031b8ebfc26d89ec4bd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7d7ab25ead969594df05fb09ee46ca931d46c5c8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/93bbf2ed428142aa9a9693721230b28571678bf8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/94d90fb06b94a90c176270d38861bcba34ce377d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d0af6220bb1eed8225a5511de5a3bd386b94afa4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e5a49140035591d13ff57a7537c65217e5af0d15\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e5d01eb6dc2f699a395d3e731c58a9b3bb4e269f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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