FKIE_CVE-2023-53234

Vulnerability from fkie_nvd - Published: 2025-09-15 15:15 - Updated: 2025-12-03 19:46
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: watchdog: Fix kmemleak in watchdog_cdev_register kmemleak reports memory leaks in watchdog_dev_register, as follows: unreferenced object 0xffff888116233000 (size 2048): comm ""modprobe"", pid 28147, jiffies 4353426116 (age 61.741s) hex dump (first 32 bytes): 80 fa b9 05 81 88 ff ff 08 30 23 16 81 88 ff ff .........0#..... 08 30 23 16 81 88 ff ff 00 00 00 00 00 00 00 00 .0#............. backtrace: [<000000007f001ffd>] __kmem_cache_alloc_node+0x157/0x220 [<000000006a389304>] kmalloc_trace+0x21/0x110 [<000000008d640eea>] watchdog_dev_register+0x4e/0x780 [watchdog] [<0000000053c9f248>] __watchdog_register_device+0x4f0/0x680 [watchdog] [<00000000b2979824>] watchdog_register_device+0xd2/0x110 [watchdog] [<000000001f730178>] 0xffffffffc10880ae [<000000007a1a8bcc>] do_one_initcall+0xcb/0x4d0 [<00000000b98be325>] do_init_module+0x1ca/0x5f0 [<0000000046d08e7c>] load_module+0x6133/0x70f0 ... unreferenced object 0xffff888105b9fa80 (size 16): comm ""modprobe"", pid 28147, jiffies 4353426116 (age 61.741s) hex dump (first 16 bytes): 77 61 74 63 68 64 6f 67 31 00 b9 05 81 88 ff ff watchdog1....... backtrace: [<000000007f001ffd>] __kmem_cache_alloc_node+0x157/0x220 [<00000000486ab89b>] __kmalloc_node_track_caller+0x44/0x1b0 [<000000005a39aab0>] kvasprintf+0xb5/0x140 [<0000000024806f85>] kvasprintf_const+0x55/0x180 [<000000009276cb7f>] kobject_set_name_vargs+0x56/0x150 [<00000000a92e820b>] dev_set_name+0xab/0xe0 [<00000000cec812c6>] watchdog_dev_register+0x285/0x780 [watchdog] [<0000000053c9f248>] __watchdog_register_device+0x4f0/0x680 [watchdog] [<00000000b2979824>] watchdog_register_device+0xd2/0x110 [watchdog] [<000000001f730178>] 0xffffffffc10880ae [<000000007a1a8bcc>] do_one_initcall+0xcb/0x4d0 [<00000000b98be325>] do_init_module+0x1ca/0x5f0 [<0000000046d08e7c>] load_module+0x6133/0x70f0 ... The reason is that put_device is not be called if cdev_device_add fails and wdd->id != 0. watchdog_cdev_register wd_data = kzalloc [1] err = dev_set_name [2] .. err = cdev_device_add if (err) { if (wdd->id == 0) { // wdd->id != 0 .. } return err; // [1],[2] would be leaked To fix it, call put_device in all wdd->id cases.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/13721a2ac66b246f5802ba1b75ad8637e53eeeccPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/23cc41c3f19c4d858c3708f1c0a06e94958e6c3bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/50808d034e199fe3ff7a9d2068a4eebeb6b4098aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/59e391b3fc507a15b7e8e9d9f4de87cae177c366Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8c1655600f4f2839fb844fe8c70b2b65fadc7a56Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ac099d94e0480c937aa9172ab64074981ca1a4d3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bf26b0e430ce34261f45959989edaf680b64d538Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c5a21a5501508ae3afa2fe6d5a3e74a37fa48df3Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwatchdog: Fix kmemleak in watchdog_cdev_register\n\nkmemleak reports memory leaks in watchdog_dev_register, as follows:\nunreferenced object 0xffff888116233000 (size 2048):\n  comm \"\"modprobe\"\", pid 28147, jiffies 4353426116 (age 61.741s)\n  hex dump (first 32 bytes):\n    80 fa b9 05 81 88 ff ff 08 30 23 16 81 88 ff ff  .........0#.....\n    08 30 23 16 81 88 ff ff 00 00 00 00 00 00 00 00  .0#.............\n  backtrace:\n    [\u003c000000007f001ffd\u003e] __kmem_cache_alloc_node+0x157/0x220\n    [\u003c000000006a389304\u003e] kmalloc_trace+0x21/0x110\n    [\u003c000000008d640eea\u003e] watchdog_dev_register+0x4e/0x780 [watchdog]\n    [\u003c0000000053c9f248\u003e] __watchdog_register_device+0x4f0/0x680 [watchdog]\n    [\u003c00000000b2979824\u003e] watchdog_register_device+0xd2/0x110 [watchdog]\n    [\u003c000000001f730178\u003e] 0xffffffffc10880ae\n    [\u003c000000007a1a8bcc\u003e] do_one_initcall+0xcb/0x4d0\n    [\u003c00000000b98be325\u003e] do_init_module+0x1ca/0x5f0\n    [\u003c0000000046d08e7c\u003e] load_module+0x6133/0x70f0\n    ...\n\nunreferenced object 0xffff888105b9fa80 (size 16):\n  comm \"\"modprobe\"\", pid 28147, jiffies 4353426116 (age 61.741s)\n  hex dump (first 16 bytes):\n    77 61 74 63 68 64 6f 67 31 00 b9 05 81 88 ff ff  watchdog1.......\n  backtrace:\n    [\u003c000000007f001ffd\u003e] __kmem_cache_alloc_node+0x157/0x220\n    [\u003c00000000486ab89b\u003e] __kmalloc_node_track_caller+0x44/0x1b0\n    [\u003c000000005a39aab0\u003e] kvasprintf+0xb5/0x140\n    [\u003c0000000024806f85\u003e] kvasprintf_const+0x55/0x180\n    [\u003c000000009276cb7f\u003e] kobject_set_name_vargs+0x56/0x150\n    [\u003c00000000a92e820b\u003e] dev_set_name+0xab/0xe0\n    [\u003c00000000cec812c6\u003e] watchdog_dev_register+0x285/0x780 [watchdog]\n    [\u003c0000000053c9f248\u003e] __watchdog_register_device+0x4f0/0x680 [watchdog]\n    [\u003c00000000b2979824\u003e] watchdog_register_device+0xd2/0x110 [watchdog]\n    [\u003c000000001f730178\u003e] 0xffffffffc10880ae\n    [\u003c000000007a1a8bcc\u003e] do_one_initcall+0xcb/0x4d0\n    [\u003c00000000b98be325\u003e] do_init_module+0x1ca/0x5f0\n    [\u003c0000000046d08e7c\u003e] load_module+0x6133/0x70f0\n    ...\n\nThe reason is that put_device is not be called if cdev_device_add fails\nand wdd-\u003eid != 0.\n\nwatchdog_cdev_register\n  wd_data = kzalloc                             [1]\n  err = dev_set_name                            [2]\n  ..\n  err = cdev_device_add\n  if (err) {\n    if (wdd-\u003eid == 0) {  // wdd-\u003eid != 0\n      ..\n    }\n    return err;  // [1],[2] would be leaked\n\nTo fix it, call put_device in all wdd-\u003eid cases."
    }
  ],
  "id": "CVE-2023-53234",
  "lastModified": "2025-12-03T19:46:39.310",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
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  "published": "2025-09-15T15:15:50.420",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-401"
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      "source": "nvd@nist.gov",
      "type": "Primary"
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}


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  • 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.
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