cve-2021-47455
Vulnerability from cvelistv5
Published
2024-05-22 06:19
Modified
2024-08-04 05:39
Severity
Summary
ptp: Fix possible memory leak in ptp_clock_register()
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
Show details on NVD website

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{
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                "id": "CVE-2021-47455",
                "options": [
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                    "Exploitation": "none"
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2024-06-10T18:55:42.625337Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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        "providerMetadata": {
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        "title": "CVE Program Container"
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    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/ptp/ptp_clock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          "vendor": "Linux",
          "versions": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nptp: Fix possible memory leak in ptp_clock_register()\n\nI got memory leak as follows when doing fault injection test:\n\nunreferenced object 0xffff88800906c618 (size 8):\n  comm \"i2c-idt82p33931\", pid 4421, jiffies 4294948083 (age 13.188s)\n  hex dump (first 8 bytes):\n    70 74 70 30 00 00 00 00                          ptp0....\n  backtrace:\n    [\u003c00000000312ed458\u003e] __kmalloc_track_caller+0x19f/0x3a0\n    [\u003c0000000079f6e2ff\u003e] kvasprintf+0xb5/0x150\n    [\u003c0000000026aae54f\u003e] kvasprintf_const+0x60/0x190\n    [\u003c00000000f323a5f7\u003e] kobject_set_name_vargs+0x56/0x150\n    [\u003c000000004e35abdd\u003e] dev_set_name+0xc0/0x100\n    [\u003c00000000f20cfe25\u003e] ptp_clock_register+0x9f4/0xd30 [ptp]\n    [\u003c000000008bb9f0de\u003e] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33]\n\nWhen posix_clock_register() returns an error, the name allocated\nin dev_set_name() will be leaked, the put_device() should be used\nto give up the device reference, then the name will be freed in\nkobject_cleanup() and other memory will be freed in ptp_clock_release()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-05-29T05:08:14.574Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0"
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      "title": "ptp: Fix possible memory leak in ptp_clock_register()",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47455",
    "datePublished": "2024-05-22T06:19:44.700Z",
    "dateReserved": "2024-05-21T14:58:30.833Z",
    "dateUpdated": "2024-08-04T05:39:59.400Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47455\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-22T07:15:10.530\",\"lastModified\":\"2024-05-22T12:46:53.887\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nptp: Fix possible memory leak in ptp_clock_register()\\n\\nI got memory leak as follows when doing fault injection test:\\n\\nunreferenced object 0xffff88800906c618 (size 8):\\n  comm \\\"i2c-idt82p33931\\\", pid 4421, jiffies 4294948083 (age 13.188s)\\n  hex dump (first 8 bytes):\\n    70 74 70 30 00 00 00 00                          ptp0....\\n  backtrace:\\n    [\u003c00000000312ed458\u003e] __kmalloc_track_caller+0x19f/0x3a0\\n    [\u003c0000000079f6e2ff\u003e] kvasprintf+0xb5/0x150\\n    [\u003c0000000026aae54f\u003e] kvasprintf_const+0x60/0x190\\n    [\u003c00000000f323a5f7\u003e] kobject_set_name_vargs+0x56/0x150\\n    [\u003c000000004e35abdd\u003e] dev_set_name+0xc0/0x100\\n    [\u003c00000000f20cfe25\u003e] ptp_clock_register+0x9f4/0xd30 [ptp]\\n    [\u003c000000008bb9f0de\u003e] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33]\\n\\nWhen posix_clock_register() returns an error, the name allocated\\nin dev_set_name() will be leaked, the put_device() should be used\\nto give up the device reference, then the name will be freed in\\nkobject_cleanup() and other memory will be freed in ptp_clock_release().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ptp: solucione una posible p\u00e9rdida de memoria en ptp_clock_register() Obtuve una p\u00e9rdida de memoria de la siguiente manera al realizar la prueba de inyecci\u00f3n de fallas: objeto sin referencia 0xffff88800906c618 (tama\u00f1o 8): comm \\\"i2c-idt82p33931\\\", pid 4421, jiffies 4294948083 (edad 13,188 s) volcado hexadecimal (primeros 8 bytes): 70 74 70 30 00 00 00 00 ptp0.... backtrace: [\u0026lt;00000000312ed458\u0026gt;] __kmalloc_track_caller+0x19f/0x3a0 [\u0026lt;0000 000079f6e2ff\u0026gt;] kvasprintf+0xb5 /0x150 [\u0026lt;0000000026aae54f\u0026gt;] kvasprintf_const+0x60/0x190 [\u0026lt;00000000f323a5f7\u0026gt;] kobject_set_name_vargs+0x56/0x150 [\u0026lt;000000004e35abdd\u0026gt;] dev_set_name+0xc0/0x100 0000000f20cfe25\u0026gt;] ptp_clock_register+0x9f4/0xd30 [ptp] [\u0026lt;000000008bb9f0de\u0026gt;] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33] Cuando posix_clock_register() devuelve un error, el nombre asignado en dev_set_name() se filtrar\u00e1, se debe usar put_device() para renunciar a la referencia del dispositivo, luego el nombre se liberar\u00e1 kobject_cleanup() y otra memoria se liberar\u00e1n en ptp_clock_release().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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